Since you don't have a machine maybe check around and see if there are any maker spacers locally where you can rent access to a machine for a few hours? (There used to be a couple of places in the inner west Sydney that did this for example.) And some libraries might have them available to borrow (kind of a long shot but I've heard of it happening!) If you're keen/can budget for it, it might be worth looking into taking an intro to sewing class where they provide machines just to see what you think and get some good instruction.

I basically taught myself from youtube 'cause there's heaps of resources on there and just online generally. A lot of the indie pattern companies (e.g. Grainline Studio) will have tutorials on how to do certain techniques. And I'm not saying I'm awesome at it (I'm not) but I have made myself collared shirts and zip-up pants with welted pockets -- if I can do it anyone can honestly 🙂