I have 800 hours in the game, played through many times with perfection.
Save at least 2 of everything. Save 5 of gold star veggies and fruits along with some unstarred.
Make field snacks and pop them like Skittles. Plan your day a bit, time is ticking.
Fishing skill first IMO, blast that as much as you can and sell as much as you can.
There is so much to do, as you find things and progress there will be more and more things.
Buy strawberries in year 1 at the egg festival. As many as you can. Year two, plant them as beginning of spring. Profit.
Also have fun, don't let the days or time stress you out.
Ha! That works, you just don't get as much money from them because it's late In the season.
I love playing stardew.