I was close to 100 after 2 months. However, I was taking lessons and playing a lot. My lessons included twilight playing privileges so I was hitting the course quite often. Only playing 9 holes or less, but I was playing. You need a good combination of lessons and actually playing. Just swing training isn't enough.
To get started, I would go find some single irons and fairway woods. I don't have a recommendation of brands (been out of the game too long) -- just go to some used golf stores and talk to the guys and see what they have and recommend. I'd get 3 fairway woods -- something around 15-16 degree (nothing longer), a 19-20-ish degree, and a 24-26 degree. They don't have to be the same brand. Then, I'd get a 7 iron, a pitching wedge, a sand wedge and a putter. And that's it. Some people think that's crazy, but a beginner can navigate a course with these clubs. The thing is, if you can learn to hit these clubs there are almost no spots on the course where one of them won't apply. You're not advanced enough to tell the difference between, say, a 7 iron and an 8 iron, so why have both? Plus, you aren't going to be driving 300+ yards (or any distance for that matter) straight anyway, so why bring a driver? Hell, there are a lot of golfers who've been playing for decades that shouldn't be using a driver, but their ego won't let them entertain that.
After I started playing, I went to Golftec for video lessons. For the first time, I saw my swing and upchucked. No, seriously, after 6 weeks or so, if you can do this, you can make some quick adjustments and maybe the last couple of weeks show some rapid improvement. I'd bet you can get to 100-110. I don't care what anyone else says but for an amateur, that's fairly respectable. At the very least, it isn't embarrassing.
I don't recommend spending ANY time at the range. Maybe later but not now. You'll only engrain bad habits. Until you get your swing right, it will only hurt you. Plus, you're almost always hitting rock hard golf balls and you make adjustments based on those, so it doesn't always translate to the course very well.
One more thing: if you can, and you have carpet at home, PUTT. Put in an hour or so a night. If you can get good at putting -- and 2 months is enough time to get pretty good at 8 feet and closer -- you WILL become a valuable team member regardless of what else happens. You can be hitting everything into the lake but if you sink 4 putts (or even get real close with long ones), your teammates will love you.