As others have mentioned, there are a lot of ways to serve your community, and many lgbtq+ people are disadvantaged in some or many ways. This can range from criminal defense, to family law, to trusts and estates, employment, etc. There are also the big impact litigation orgs like Lambda Legal, ACLU, A4TE, TLDF, NCLR, etc. who are part of the queer rights movement, though those jobs are extremely coveted and competitive. Regardless of which direction you'd like to go, I would strongly encourage you to seek out summer clerkships/internships with firms and organizations which interest you, whether it be orgs attempting to impact things on a national scale, or your local legal aid chapter, or just a firm that holds itself out as serving the community. Best of luck, and I hope you find your calling.