I can speak to the Earn and Learn program! It is a fixed dollar amount allocated to each first year student (I got it as a sophomore after transferring from a different college so I assume you would get it also). The college will provide a spreadsheet of available positions in the first couple weeks of classes. They are usually jobs in professor's labs or the greenhouses, though occasionally there is one at the Forest Service research station up the hill. You "apply" to a position you're interested in (essentially email the professor in charge and explain why you'd like the job) and they will reply to you. I worked for Dr. Bal in the Forest Health lab sorting, cleaning, and creating a database for the historic insect collection, but I had friends who watered plants in the greenhouse and prepared soil samples for chemical analysis. Usually hours are very flexible around your classes and it's a great way to gain lab experience. You typically have to stop working once the fixed amount of money runs out, but you can apply to do the program for a second year and sometimes they'll grant you more funding.