Scrims are actually pretty accessible for anyone, if you have enought time to grind ranked you can join scrims. It would be best if you were plat+ because usually the higher rank the more serious the scrims are. And if you dont have the time to always play in matches, You can always make your own team. Managing a team may seem time consuming, but you can do it whenever you want compared to having to play in scrims at set times everyday.