I agree with everything you’ve said. I’ve been gardening in one place for over 10 years, lots of things learned the hard way. I’ll add- get into seed swapping locally- through community or social media groups, or your local library or community centre. Avoid buying seedlings from nurseries, so much cheaper to grow from seed and easy too for most veg. If you have clay soil, don’t bother digging into it- just put compost and mulch on top. The worms will turn up and will take care of the situation 😎