to make your account stronger, it's quite basing on "the time" and "the times".
"the time": the longer you warm up your profile, the stronger your profile will be. normally it should be more than 3 months.
"the times": the more times you warm up your profile, the stronger your profile will be. normally it should be more than 30 times.
you don't need to do many actions to warm up it every time, only need to take about 3-5 mins to do some likes, comments and shares.
and you should better warm up it every 2-3 days. so it will be about 30 times during 3 months. then your profile will be very strong.