It's nearly impossible to change your hair's natural texture without heat or chemicals.

I highly recommend embracing your hair and letting your hair do what it wants to do. Once you stop fighting with your hair and accept that it will never look your fantasy hairstyle, it will become so much nicer. If your hair wants to mimic a wild lion's mane, let it do that.

Alternatively, you can try twist outs, braid outs, or doing roller sets, but I never had much luck with those techniques.
Hair type: Mostly 3C, medium porosity to high porosity depending on the day, dense, fluffy, dry, tangly!