who do i play?

i only recently started playing valorant on my old beta account that i just hit level 20 with. i naturally lack gamesense and good map picks etc.. on my placements (ive done 4/5 now, 2w2l) i was playing firstly with plats, then high golds and now low golds and high silvers. i played those matches as brimstone (i dont like being flamed when i dont know how/where to smoke plus hes hard to play imo) and lost, on sova (its an okay pick, if only a bit hard to play) and also lost but it was a close game, then i played a game as killjoy (on sunset) and fell in love with sentinels. then i played another game as kj (on abyss) and won yet again. i will play kj and continue to play sentinels or agents with similair playstyle. it begs the question though: who do i unlock? i currently have 7k points and im looking forward to buying vyse or cypher and i cant really decide who do i play. so i came here to ask you guys what is more recommended.