Depending on your location there might be day classes, but if you are somewhat remote then your best bet is buying a sewing machine, watching youtube and following along with some beginner patterns. Singer, brother, janome are decent brands with decently cheap entry level machines.

You can get cheaper second hand ones but that comes with a risk that the machine has a fault or needs something done to it that as a beginner might throw you off. Same deal with the very, very cheap machines some might work just fine, but theres a chance that it chews fabric or breaks threads and as a beginner it will be harder to tell if its the machine or you. So a cheapish branded one is a safer bet.

You could also start with hand sewing, its cheaper again. All you need is a needle and sone thread. But Id say its harder than using a machine and takes longer to finish projects. It would be fine if you wanted to start by mending small tears and fixing buttons. But really hand and machine sewing are two very different beasts.

A few classes to get you started are a good idea, if none of the other recommendation works you can also ask your local fabric store. (better if it is a local or small business, big chain stores might not know about that sort of things) If the budget is really tight handsewing is always an option but it takes a lot more time. You could also attempt a bit of embroidery as a start, it’s not quite like sewing but still involves a needle and you can get a cute result faster.

You should give it a go! Do you want to learn hand sewing or using a sewing machine? And what kind of stuff do you want to make? I learned a lot from youtube tutorials and took a class for some techniques I couldn’t figure out by myself.

You’re thinking machine sewing I assume? It’s best if you can find someone with a sewing machine to take you through how the machine works and help you try some seams. If you don’t have someone to help you, you can check for classes (for instance from a local quilt shop or community center), and acquire a machine to practice with. Some libraries have machines you can use, or get a cheap basic machine from someplace like Walmart. You might also get lucky finding a machine at a thrift shop but make sure it works before buying.

Have you already checked YouTube for tutorials? When I took home-ec back in high school we started with learning how to cut fabric and pin it together, how to properly thread the machine, how to operate it safely (there is a lot of force and moving parts and you have pins everywhere) and practiced sewing straight seams on two layers of cotton. Our first project was a draw string bag. If you want to start really basic you can always do some hand stitching (running stitch) to get a feel for how the fabric behaves and how to piece things, and plus that’s a good skill for basting when you are machine sewing.

YouTube, Grandma, or if not available, someone else’s grandma.

There are plenty of programs to help out in senior homes(depending on your country) to help make people feel better, and as a bonus learn to sew.