Will I get a decent college in pune or Mumbai my score in mhcet 2019 is 79 for engineering

Hii aspirant
Your ranks will be between 50000-60000
and with this rank you will not be able to get a government college in Maharashtra
But you still can get admissions in many private colleges to pursue your engineering for more information regarding your college you can check The following link
https://engineering.careers360.com/articles/mht-cet-participating-institutes
and can apply to your desired stream in college in which you are eligible
To predict your college I am sharing another link please fill your credentials and predict your college

https://www.careers360.com/mht-cet-college-predictor

Score is quite low, but surely try for as many colleges as possible.
It will really help you out.
Since 79 is the average marks.
And somewhat here your caste category plays an important role.
I hope this will help you out.
All the best.