This is pretty great for your first cinematic track. :)
Cinematic is a bit different to every genre, so well done on giving it a shot. I think your placement of your instruments and the choice of instruments is really nice. The guitar I felt could be a bit in the background compared to the rest. But I think that's a personal preference.
A few ideas to help furthering yourself after this I'd say is, automate what you can, use your velocities of your instruments to sweep volumes to create tension and interest. Things don't always have to have the same mood all the way through, you can change key, tempo, timings any time you think it's necessary (unless your scoring to film timings). So although it's quite an easy thing to fall into when creating a track try break up the repetitive structures which occur when making digital music. Break tracks into chapters, set yourself some visual goals to reference and have a mood, which I see you did here, but add more to it than just a concept, keep a visual timeline in your mind and the progression. This will help change it up and create interests to the listener. It was help anyone whos listening get sucked into it when listening to it the first time.
orchestration wise I think you have plenty of room in your mix to add more instruments, so dont be afraid to go from subtle to climax to bring us back down again right back into a climax. Cinematic allows you to play with these kind of elements.
Keep it up! Looking forward to hearing more. :D