Practice that swing timing as much as possible. Play as much ALT shot or Stroke play scored games as possible so you can level up and purchase better clubs. Yes, I said purchase. This game does come at a price. But IMO it's cheap entertainment.
Keep the irons you have until you reach Level 17 and get the G10s.
Keep the putter you have until you get to Level 28 for the Anser.
Upgrade your driver to the Burner SuperFast 2.0 10.5° Driver .
Upgrade your wedges at Level 14 to the Z Satins.
You can win credits playing against other players in match play or you can enter Ready Go tournaments that are within your tier to win credits. Or you can just charge it on your credit card.
You can still play well and compete with starter clubs but like many others before you it will get extremely frustrating.
You can sustain your account in balls and other new goodies without depositing another dime by strictly playing RGs or match play for credits once you get the GUI down. Don't expect that to happen in a week or even a month.
One other piece of advice is to take notes and keep them handy. How the wind effects a shot, the lie, green speed, how far each club travels etc etc.. Those notes will help you score in the future.