There are a lot of free sound packs available through Elektron. And has been written here recently, the Gutnishy pack breaks some new ground.
When I first got into A4 and went through the preset sequences, I took notes of all the different ones I wanted to go back and research how they were made.
This thread is full of great tips and joy.
Just remember to save your kits, and be mindful of which kits are linked to which patterns.