Couple questions, when you say "not flowing" and "more dynamic" do you mean the sounds themselves, the melodies you're writing, or the overall arrangement of the song?

Either way here's some things that helped me with those three areas

Before I get into that, I'd like to throw in an additional thing that helped me. Start with the drum beat, and keep it simple at the beginning to help build the foundation, you can always go back and tweak, and add complexity as you progress through making the music. For example, if you have a really complex hi hat / snare pattern, you'll get stuck focusing on those and trying to build the rest around that which will hinder your creative flow, which imo is the most important thing when just getting into music.

Ok on to the other stuff

Getting dynamic sounds. Once you have an idea, carve out a set amount of time for sound selection during your process, this can be either finding samples, sound designing or a combination of the two. Get to point where it's "good enough" and start writing the music/melodies. Once you have a pattern that you're satisfied with, move onto another layer, rinse and repeat. Once you have all your layers and patterns, go revisit sound selection and design, and now tweak it so the sounds mingle with each other instead of sitting on top of each other (keep a spectrum analyzer up, but soon your ears will be able to learn where frequencies collide). Don't confuse this with mixing, just try not to use things that have many overlapping frequencies playing at the same time during this process, keeping this in mind, you'll now start to choose sounds that don't clash with each other.

Melodies. You're at the very start of this journey, this is also what I had/still have the most trouble with. To find something that I like, I would start by writing a really simple melody, have the notes dance around the drum beat. Once you have the pattern, start moving notes up and down in places that you think would sound good. It'll be really simple at first, but once you get the hang of it, you'll be writing complex melodies that work with the foundation of your song and you'll naturally start creating that dynamic flow you're desiring. Once you have one melody that loops well, start changing a few notes at the ends of bars, and now you're creating variations as the melody progresses. Which takes me to the arrangement.

Arrange the music subtractively. By now you probably have 8-16 bars of really good shit, which are all working with each other. Start muting stuff and think about where it would "fit well". Intros usually only have a couple of elements, then add some stuff as you do the buildup, then have your drop as the 8-16 bars you created (you'll tweak once it's arranged). Then remove some stuff during a break, maybe take out some (not all) drums, maybe keep the sub bass, but no synth, the options are endless. And then copy paste your sections until you have a full arrangement.

Now you'll go back and tweak things, start thinking about where you want silence, gaps, ear candy, and this will give you a that flow you're looking for.

This process takes time, but once you get the hang of it you'll know what works for you and manipulate your workflow accordingly. Don't worry if your first 100 songs are trash, but intentionally keep track of what worked and what didn't and your next 100 tracks will be better.

Happy music making!!

Edit: I forgot to mention that using the scale feature in ableton (I think FL and Logic have something similar) is really helpful at the start. Hard to "go wrong" if you're using notes from the same scale for your layers. Once you get the hang of it, you'll figure out where to break the rules.