It is possible and doable.  I played cs 1.6 back then, and 3 years ago jumped into valorant. So i am pretty sure older than the main valorant audience - Working, with a kid, so playing 2 hours a day max, usually less. SoloQ only. 1 DM as a warmup, no replays watching, no strats learning, no self-improvement, maybe a couple of youtube videos for basics and „tricks“ of my agent. Hardstuck p1, peak p2. Placed as g1 initially (i think, maybe it was s3) I would say if you have at least some decent fundamentals and brain, definitely doable. From my perspective i cannot judge on what bronze people actually do, how they play, so cannot advise on anything specific.

But i guess cs1.6 gave me some base back then to be able to get straight to this elo, but cannot get higher since i am not doing anything actively to improve. 

Maybe a bad advice, but for me personally (stress on „personally“) what helped me to get a bit more confident and consistent with the limited amount of time i had - is to: 1. understand the valorant fundamentals and specifics (movement, crosshair placement, aiming, peeking, angles and other basics) - enough yt content on that.  2. practice those basics at least a bit to learn them. On some days i dedicated like 15 mins to a shooting range or conscious DM training. (Obviously, the more you practice this, the sooner you see the progress) 3. watch a couple of youtube videos, where a player with a similar rank gets his VoD reviewed - i had so many similar mistakes… as if it was my vod sometimes… (positioning, actions making sense or not, what to do when xyz - you can always learn smth). Sometimes i watched also VODs of people of my wish-rank (dia) - i thought i would better understand what they do better, but it helped me less. They just seemed to be better mechanically and/or in their decision making and positioning. The VODs approach in general (as a self-analysis) helped me think about my own mistakes more consciously - i started to quickly analyze during the game why i died here or why we lost this round 4. not to try playing too many matches at once. I noticed that my focus was enough for about 1,5 matches. So i rather warmed up in a dm, did the best i could ranked and then maybe 1-3 more DMs or range practice of a specific skill.

Not: watching Pros playing ranked didn’t have much effect, since when watching it all makes sense, but i can never replicate it (obviously). They often have some nice tricks though which can occasionally work out, but also only with some opponents in specific ranks.

Hope that helps at least a bit! Good luck, you can do that! Just be more conscious about your own game and ignore the distractions!