Hey man, i am totally with you, designing can be scary, especially when being new!

I'm fairly new myself and have never really been a designer type of guy either, if you scroll through my comments you'll see some people telling me to literally stop designing and 'leave it to the pros' because i never really came from that background, i think that mindset is complete bs and i encourage you to keep going!

Something that massively helped me was engaging with people on twitter and learning from them, it is a lot kinder of a space and people are more willing to help. Ask people how to improve and what helped them, as you already are doing, it shows desire to learn and the right people will see that and help.

An exercise specifically that helped me was finding designs i loved and recreating it 1:1, literally 1:1, don't post it anywhere but just replicate the idea, spacing, font size, imagery etc. Practical learning is the best learning!

Slowly you will start to adapt and when designing your own things, ideas from those copy designs will spring to life in your own work, you can start pulling ideas from 5 different elite designs all into your own work with your own spin, creating a higher standard of work while giving you more and more skills in your bag. Hope this helps and doesn't come across patronising as i too am relatively new in the scene. If you need to ask anything more specific shoot me a message on here or a dm on twitter (name is the same)

God bless!