The best way is to interview at good companies and get offers from them. That means the usual Google, Facebook, Apple, etc. and also up-and-coming ones (Uber, Lyft, etc.). You don't even need to want to work for the company but getting an offer will tell you your worth for the future. You will need to study hard for those interviews but it's well documented online what you need to study specifically (read Cracking the Coding Interview, practice Hackerrank, LeetCode, etc.).

There's generally threads online where recent grads say what offers they've gotten from companies and websites like www.paysa.com that try to aggregate them but those are all biased.

Equity is a gamble not in your favor, read up on how many startups fail outright, how many sell for basically nothing, and how much you're going to get diluted in funding rounds. Founders will say otherwise but it's their job to sell you so don't trust them. So if you do want to gamble on a startup make sure to heavily discount the value of equity when negotiating.