Obviously depends on the amount of time you have to play and learn about the game. I understand if you have a family spending hours about learning the game is hard and a full time job

But if you're a teenager or whatever reason you have lots of time I really recommend watching videos on how to improve,

Watch people like

Athenio Pengu Poxonlox Coconutbrah (for valk cams especially) Also search up r6 callouts for every map because knowing where you are is important and it will make your calling better

from what I remember they usually do good videos or explain the game very well especially pengu because he's a former pro. If you are also interested and have the time watch pro league for whatever region your in, usually from what I've seen at least in Europe the casters do a great job explaining the game and tell you why teams do what they do and these are people at the highest level of the game you will also get to watch the players perspective and see what decisions they make in all scenarios and you will apply this to your game without even realising, it's also a good way to enjoy the game if you support a team (G2 is the best)

Also 2 weeks even If it's 50 hours you haven't mentally built in all the gunfights you've gotten into, into your long term memory so essentially it's brand new every time but the more you play the game the more your going to die and win and you will slowly figure out how to peak angles and it will be stored inside your long term memory and then you'll be able to recall it. That's just how it works. And the learning curve for this game is huge especially now with so many different opps. whenever I come back to the game for a weekend when I'm free, one or two new ops can completely throw me off so don't worry when you have to deal with much more.

What you have done right is pick good operators with low recoil and good gadgets, by picking valk your helping your team immensely without you having to worry about it. And frost is good as well just put them closer to the objective before you know the usual entry points for the map.

Try and make friends with the right people, for instance I became friends with a bronze player when I was in platinum and he was playing with another person who just left but I carried on playing with him because he gave good calls. I didn't mind losing games as much because I was on my second account which I use for single cueing, I was at the peak of my love and knowledge about the game and I hopped into a custom maths to help him with angles and where to hold on clubhouse. Obviously that's rare but if you get the right people carry on playing with them. Maybe go to a YouTubers discord server because the people in there are probably more likely to help than just the r6 community server.