Thats great, what MOCs do you like to build? Do you have a theme you stick to?

Both are great themes that hold their value well. Whats tour average sale on rebrickable?

Welcome, Levi! Technic has some incredible sets. I tend to focus on selling the sets I don't like as much to fund the sets I do love to keep. Haha But there is a market for selling technic. Bricklink.com should give you a really good idea of what the value is on the sets you have and if they are worth selling.

@Adrianne Cameron Absolutely, it depends on if you are a fun display and playability or investment holds. What is your main goal?

@Levi Ferreira Great time to get into it! I would focus on mini-figures, you'll need to verify the condition and completion of the figure. I have had a lot of highschoolers make hundreds per month just from the figures. You are in a prime location at school with many getting out of Lego you can usually get them at a good price or even just do consignment. They give you the collection and you sell enough to pay them what they want for the lot. Bricklink.com will be your best friend.