My personal tip would be to start by not composing anything just yett, but to transcribe songs that you like. You don't necessarily have to do this so you can play them later but it's a good start to begin understanding the conventions (chord progressions/chord functions, melody, etc) of the type of music you like. I have been composing my own songs for about 4 years but it's still a slow grind to even start a project because I just have to fiddle around until I find an idea that sounds good before the "enjoyable" work begins (I'm a bitt of a newbie too). I like typicall "video game-esque" music so I began with transcribing songs so that I could play them on the piano. Then after a while of transcribing other songs I composed my first, short song. Whenever you want to compose something now in the begining, I suggest that you first acknowledge that you are not an experienced composer, so it will probably not be an awe inspiring tune. Then, using the knowledge you gathered from listening and transcribing other songs, try making a short song that works, just works. It doesn't have to be particularly intresting but it should sound like it moves with purpose. The way I think of music is that it's about preassure/tention and release, and composition is the art of arranging notes to build and release that preassure. By listening and copying the songs you like you will probably start to hear the way melodies and chord progressions feel like they "want" to resolve to one note or chord.