Hi and welcome!
If you have rhythm in you then I recommend starting with making drum beats.
Two options would be to either:
Start using a free tool that incorporated a piano roll type environment where you map out the beat using little markers on a timeline. This is tedious, but can be quite rewarding if you put the time in.
If you wanted something more tangible and were serious about your new hobby, pick up a secondhand unit called Native Instruments - Maschine. The Mk 1 will be sufficient for a starter, and you should be able to get quite cheap. This doesn’t make any sounds by itself, so you need the software and a computer. Find some free drum sample packs and dump them into the software and start tapping away while recording everything you do.
Once you have some beats you like the sound of then move onto creating some bass lines or synth lines with free VST plugins like mentioned above. We have a whole thread that people have posted all kinds of free plugins. Free plugins! - The Studio - IDM Forums
Once you have played around for a while, you will start thinking of more specific questions on what you want to do. Either look them up on Youtube or ask them here and we’ll be happy to help. Some may have already been answered here so you can use the search function as well.
It’s helpful to start this way before trying to emulate artists you like, but once you get those questions and start to get a good feel for what you’re doing, then emulating artists you like is also a great way to learn more complex techniques.
Thanks for stopping by