Just my opinion, but I don't think it's a particularly worthwhile goal, for two main reasons. First, if you are around about a bogey golfer, it is not lack of distance that is primarily holding back your scoring, it is lack of consistency. And second -- in my own experience -- it is very difficult to significantly increase your club head speed, at any level of the game. Yes you read all over the Internet this guy and that guy posting that they started gripping the club a little looser (or whatever) and immediately gained 20 yards on their 7 iron. I think it's bullshit and, myself, have yet to see any player go from pitty-patting it to really crushing it out of sight unless they are a junior and go through puberty in between. There's plenty of anecdotal evidence at the top level, too. Paddy Harrington spent two years focusing intensely on increasing his club head speed. Strength training, stretching, overspeed training, the lot. And he's a fanatic hard worker so you know he didn't half-arse it. He gained 1 mph on his driver.
Don'y get me wrong, this doesn't mean you -- Hacker James -- can't still learn to hit the ball further. I'd just suggest that trying to swing faster isn't the way to reach that goal. I play with a 71-year-old lefty who swings in the low 80s with the driver and is hitting it a lot longer now than he ever has in his life -- just because we fixed his geometry. I've posted these before but will again just for illustration.
You can see how much more energy he's transferring to the ball once we change the down-and-across club path. Even swinging 6 mph slower, he's carrying it 25 yards further. We altered nothing about the swing except his setup and his mindset.*
Not suggesting you are as extreme a case but again, just my opinion, this is the sort of area where you are going to find yards at your age and your level, not in the squat rack. Although you should still hit the squat rack, bcuz gainzzzz!
(* PS: Now he can finally hit driver, but his irons are a hot mess. There are no free lunches in golf or life.)