Select RUSA (Reference and Users Services Association) and BRASS when you join/renew with ALA. With a RUSA membership, you can join BRASS at no extra charge.
How about participating in the BRASS committees? You do not necessarily need to travel to conferences to volunteer. While some committees must meet in-person, many have virtual assignments, and some do all their work online. Most committee assignments last two years and begin and end after the ALA Annual conference.
Are you new (5 years or less) to business librarianship, and trying to learn all the ropes? (So many business databases!) You're not alone! Join the club, via this BRASS New Business Librarians Group, which also meets at ALA Annual.