I'll give you a tip, actually a a couple that will be valuable. I have 3 accounts I struggled solo queuing to Masters for a while and after I got there on one account I took the others to Masters in 1 day of playing them it was pretty easy. I don't know if you're pc or console but it may be similar experience with what I am going to tell you.
You Must Must Must, master a carry champ this is really the most important thing and will separate you from the pack otherwise you'll hit a wall and derank at high ranks. The reason is their impact, if you're PC then a tank is a sold first pick, but if you're console you absolutely have to get the carry champ which will be a flank or damage or Khan. Reason being is the wide range of match making, you just simply can't have the last 2 picks on your team matching up against the top 2 picks on the other team where the skill gap is a much larger factor. Pitting D1m Masters or GM flanks/damages versus Plat 1-D3 damages is a recipe for disaster and when you're trying to break into masters this detail WILL plague you.
Use Paladins forge if you really need to get to Masters, not that I had to but I know a lot of ppl who do and it helps. When you're selecting champs check how low the last pick is and what the other teammates play well so you can make a decision that will make everyone comfortable to get the best performance out of your team.
Get champs who can do multiple things if possible which just continues step one. Look you're going to have to carry at some point to get into masters you need to play champs who sway the game hugely which is why I had Khan as a carry, if your team picks bad you can hold the point, heal or go kill the other teams flanks if necessary. Furia with Solar blessing and damage can carry at times she's not the best but she has a carrying ability.
Put in your Mic and Talk, communication is key especially if your team isn't very skilled because you can tell them where to be and what adjustments to make.
Last and most obvious is just find a good Duo partner. The tips above are almost imperative for solo but you can loosen the leash on all that with a solid partner.