okay here is an example from your pic ..cleaner lines and geometry .... in the pic ..the 1- 5 show how many sides you have ...it is over five .you want to have four cause it is cleaner ..but sometimes impossible and 3 can do but I would try to do four ... just look better when you convert and cause less issues and just look at the frog and dragon. see how the lines all look good and no that many ? and just flow all one direction most or all are four sided ?

the pic i posted below is not the best but will work .. but more time you have nice clean model and four sides the better down the road on harder models


trust me it is hard to learn but worth it ...

I am far from the best at all just learning but that is one thing i learned quick and trust me helps