Often those older than us can give us good advice. Look for advice from people who encourage you, or give you warnings that you can take and apply to life.

Ignore people like your older brother when they just put you down, and egg you on (no pun intended).

Never make a decision, especially one involving living creatures, in the "heat of the moment". Taking shortcuts is a surefire way to lead to disaster, and producing a clutch right now just to shut your brother up isnt the way to go

I can definitely see how 2 years seems like a long time to you, but just imagine how far along you will be by the time you are 24 (10 years from now) if you work on these projects and grow your collection (if that is your goal).

Good luck, keep focused on YOUR goals, and only take advice, not insults, and make this your plan, not someone elses.