What You Actually Need to Start, and What You Do Not
The Honest Equipment List
Yoga is one of the few physical activities where the barrier to entry is genuinely near zero, and the industry around it works hard to obscure that.
A mat is the one purchase worth making. Not for cushioning, which is what most people assume, but for grip. On carpet your hands slide forward in any posture where you lean into them, and on a wooden floor they slide even faster. A mat that holds still under a sweating palm changes what postures are possible.
Look for something around 4 to 6mm thick. Thinner mats are for people with strong practices who want to feel the floor. Thicker mats sound kinder and are worse for balance, because your foot sinks unpredictably. Natural rubber grips better than PVC and smells for the first week. A cheap mat is entirely adequate to find out whether you like this, and it will last a year of home practice.
Two blocks and a strap cost very little and are worth more to a beginner than to anyone else. A block brings the floor closer, so a posture your hand cannot yet reach becomes a posture you can actually hold with a straight spine. A strap does the same for anything involving reaching a foot. These are not training wheels to be discarded; experienced practitioners use them constantly.
If you would rather not buy anything yet, a thick hardback book substitutes for a block and a dressing-gown belt for a strap. Neither is elegant and both work.
A folded blanket is genuinely useful. Sitting on the front edge of one tilts the pelvis forward and makes cross-legged sitting possible for the large number of adults whose hips do not permit it on the flat floor.
What You Can Ignore
Specialised clothing is optional. Anything that stretches, stays put when you bend over, and does not have a thick seam down the back of the leg will do. Loose shorts ride up in inversions; that is the whole science of it.
You do not need bare feet on principle, but bare feet grip and shoes do not, so bare feet it is. Socks are the single most common cause of a mid-practice slip.
Do not buy a course, an app subscription, or a block of classes before you have done ten sessions. Whether you will keep doing this is unknown until you have tried, and the money is much better spent later.
Space
The real requirement is a rectangle roughly the length of your body plus your outstretched arms - about two metres by one. Stand in the middle, put your arms straight out, and turn slowly; if nothing is hit, the space works.
The one thing worth checking is what is directly behind you when you fall over, because you will at some point step out of a balance in an unplanned direction. A clear metre behind and a wall you can actually use for support are both good.
Where the mat lives matters more than where you practise. A mat in a cupboard behind the vacuum cleaner adds a decision point to every session, and decision points are where habits die. Leave it rolled in the corner of the room you will use, or unrolled if you can bear it.
Time of Day
The traditional answer is early morning, before eating, and there is something to it - the day has not yet filled with reasons not to.
The practical answer is whenever the session will actually happen twice this week. Evening practice on a stiff body is a real practice. A ten-minute session after work that you keep doing is worth more than a perfect dawn routine you sustain for four days.
Avoid a heavy meal in the two hours beforehand, since a good deal of yoga involves compressing the abdomen. Water before and after, not much during.
The Flexibility Question
The single most common reason people give for not starting yoga is that they are not flexible. This is like refusing to start running because you get out of breath.
Flexibility is the outcome, not the entry requirement. Every posture in a beginner sequence has a version that works for a stiff body, and stiff beginners frequently progress faster than naturally bendy ones, who tend to hang on their joints rather than build strength.
More usefully: range of motion is not the point of the practice. Balance, breath, and the ability to notice what your body is doing are all available on day one, regardless of whether your hands come anywhere near the floor.
Before the First Session
Three things worth deciding in advance, because deciding mid-session is how sessions end.
How long. Pick a number you are confident about and then halve it. Fifteen minutes is a real practice. Ten is a real practice.
What. Have a sequence in mind, written on paper or followed from a video. Improvising while stiff and self-conscious does not work.
What sharp pain means. It means stop. Muscular stretch is broad, warm, and tolerable, and it eases as you breathe. Pain that is sharp, pinching, electrical, or located in a joint is a signal to come out of the posture immediately, not to breathe through. This distinction is the single most important thing a beginner can learn, and it is the one thing no video can teach you.