Is it a good idea to create a fresh account for ranked?

Hi guys, as you can read the title, I'm kinda having a case of doubt. My problem here is that I really want to climb but I feel like my mmr is pretty bad. I know to make my mmr better I should win more games (sometimes I'm on a winning spree but it feels like my mmr isnt changing due to the same lp I gain and lose before the winning spree).

When I got to lvl 30 on this account (2 seasons ago) I jumped into ranked without having a sense how the game really worked: I couldn't farm (example 28 cs at 15 minutes), I had no sense about the roles and I didn't use the minimap at all. Maybe this ''bad'' start doesn't matter at all and I should just focus on improving which I'm trying, however creating a fresh account with fresh mmr may help me with climbing. I also know that if I just improve, at the end I will climb, but at the moment it's just really hard to climb for me (win = 15/16 lp, loss = 20 lp). Maybe these are the normal lp standards, I don't know. I also don't mind putting time into leveling a new account. I have enough time, so I won't mind that.

Do you guys maybe have advice or an opinion about this? I'm open to all advice as long it isn't toxic ^^