First off, bait image-

I’m thinking of installing a different android on my crapphone, it’s an lg k5 if that matters, cheapest phone I could buy cash while I finish paying off the iphone6 I smashed. Anywho, it’s only an 8gb phone and over half is taken up by useless t-mobile apps and such, I barely have anything on there and it still doesn’t even have space to update the few apps I do have. I’m reasonably competent, I was a compsci major in college and use Linux fairly regularly but have never modified a phone at all, where do I start? Thanks in advance, you are now free to wonder why the above image showed up in results for rally smart car.