There is much sage advice above.
I built my first glue kit in late '63, and went hard and heavy and had FUN
untill I joined our model club in '85. The club had/has some very noted builders.
Then I was taught the evils of mold lines, seams and orange peel.
They meant well, but it was so drummed into us that even on a shelf model
such evils were unacceptable. As a result productivity and FUN went way down.
I suggest trying one thing "new" on each model you do. Don't try to do a lot on
any one model at one time, or you might find yourself getting bogged down.
As you get comfortable with each new step you can incorporate more into
your next model.
The main thing is to have FUN!