pancakesandmaplesyrup welcome to the madness. The world of cake can be quite a bitchy place so I'd start growing your thick skin now in preparation. Cakers are very competitive and very much smiles on the outside. However, there are some lovely ones too.
My best advice to you would be start as you mean to go on. Price properly for everyone except family. If you do mates rates to get some pics in your portfolio/ insta feed then just knock a tender off not half price ( bitter voice of experience).
Value your time as well as your skills and if you have a talent for something, say sugar flowers, then play to that.
Pricing, cost of good quality ingredients, factor in utilities, wear and tear on goods, oven, micxers etc. And add on your hourly rate. Do not work for less than minimum wage. It's not fair on you and it's not fair on fellow bakers. Drums ( thick board that the cake is presented on cost around 3/4 quid each. Boxes are a couple of quid each.
I'm completely self taught. I've never done courses. One of the main reasons that I won't do courses is that one if my goals in life is to get on GBBO and in order to get on you mustn't have been professionally trained. I've applied 4 times so far. Last year I got to phone call stages. One day 😂😂
There are lots of courses out there but they're very expensive. Prohibitively so Imo.
Join some Facebook groups. Look for a local one as well as the big groups because that's where you'll make friends.
If you want to chat feel free to pm me any time