#1 Figure out if you want to be a pilot, or whether you want to be a commercial airline pilot, which means going where people tell you, lots of time spent in airports, only being paid while actually flying, etc. This can be great for some people, or for others realizing how long they have to work at it at the lower levels earning little a huge awakening when they realize it's not commercial license and then on to 747. There is often a good 20-30 years in between there. There are many jobs and opportunities in aviation outside of commercial airline pilot, there are many jobs and opportunities in aviation outside of being a pilot that would keep you in the industry, and there are many jobs that can fund a healthy flying-hobby.
#2 Don't believe ANYONE who says you need to get licenses and certificates RIGHT NOW or REAL FAST. This is the same line that's been played for the last 30 years. It's a crap shoot either way and it in no way increases your chances, it just gets those people making the claims a more secure cash flow.
#3 Be honest with yourself and your instructor. There's no shame in "not getting" something and needing another instructor or to repeat things. At your age, you are a better judge of your instruction than a younger guy. Don't let them short you experience or learning. Also realize that much of it depends on you. Depends on your motivation and ability to do things on your own. You can cut costs hugely by studying on your own and learning what you need to know. Most of us get better with this with experience, but the best students stay on top of it from the beginning.