Lessons from a PGA professional and properly fitted golf clubs sold to you by a PGA professional will be the smartest money you ever spend. I know the latest craze in golf from a consumer standpoint is to buy the biggest titanium driver on the market. Yes, that may help a few people, but it has been my experience that most golfers are playing clubs that do not fit their swing. Everyone who plays golf has a different body shape. Your build affects how you will swing the golf club.
Some people are tall and thin with long arms, while others are short and barrel-chested.
As a college golf coach, I am fortunate to work with good players. I had one freshman show up with new forged blades that he paid for with his own hard-earned money. After four weeks of terrible play, I fitted him with a different set of clubs. I compared his old set of irons to the new ones and found that he had been playing with clubs that were 6 degrees too flat a lie angle for him. Since that one-hour session, he is one of the hottest players on the team.