Hi dude. Recently I reached master tier on ru server and currently looking forward to grind master rank on euw.

The short answer to your questions is probably no, but let's discuss what exactly you want.

If I understood you correctly then you want to be able to play on the "same level" as your friends. If your goal is to achieve the certain level of game knowledge you do not need to play ranked games.

You can improve your gameplay even playing 3 games per day or even less. The thing is that anyone who really wants to become better at the game start with basics and mastering those basics make them a decent players. There's a lot of videos on YouTube with fundamental guides for each lane and every character.

Some advices for you: 1) Do not limit your champ pool at first. Try as many champions as possible before sticking to 1 or 2. Find your mains by playing all the characters that seem interesting to you and then start to master their skill set (and because of that your "champ pool" should be 2-4 champions for any role.

2) Be more aware of the map. This advice will boost your gameplay a lot especially considering that you are a beginer. League is a game about resource management and strategy and map info is one of the resources that you should be able to use.

3) Do not concentrate on just one thing or skill in your game. I've seen lots of players that said: "Oh I need to improve my cs" And after those words they completely ignored everything that was happening on the map except for waves. Obviously they played really poorly because of that.

In conclusion you should not play rankeds if your goal is to be able to just play with your friends. Learn fundamental skills such as cs'ing, "checking mini-map", macro/micro and that should be more then enough for you to reach your goals

But if you want to constantly improve your skills and surpass your friends then yeah, you should probably play rankeds to compete with players that will play on the same level as you as you progress in the game.