I started learning Photoshop around 2010 by making signatures for the guys on the old MW2 Forum. Lucky enough to now use Photoshop, InDesign, Illustrator and After Effects in the day to day of my job.
! I think to start just ensure you are comfortable with using the basic tools. Even with the more complicated work I do now, it's essentially just problem solving how to get to your end result using those basic tools. I remember finding a lot of the tutorials quite boring (and I have a terrible attention span), so try and pick ones that have you create an end image (not just 'this is how to do X'), and you will start to just absorb the information.
If you need any help with anything, feel free to shoot me a message!
I'll attach a few examples of recent work I have done:
1 - Free Standing Display Unit to go into Sainsbury's stores. You can see this in stores across the UK currently
2 - Disney Storytime Collection Slip Case - A new product available on Amazon. I don't often get to design the actual products, more the marketing materials, so this was a fun change of pace.
3 - I create yearly catalogues across different the different imprints. Whilst I can't share the 2021 catalogue, this is a page from this years.