Bye Bye Buguntu, Hello Budgie Buguntu...

!rant

I often have the problem of messing up my Linux installation, it gets unstable or the desktop envoirment gets slow / unresponsive

I want to switch to Ubuntu (with budgie) for quite a while but I'm afraid I mess up my system again...

Any tips for an inexperienced Linux person? tips to keep your system healthy and stable, tings to avoid when installing (like adding unofficial ppa...)
Thank you in advance 💙
(also how do you deal with errors? Do you just search the internet and try it out? ((and yes, I did brick a few installations 'trying it out')) 😅)