Try and organize a meeting, see who you can get to come out, obviously you need a few people first. To get a sponsor you'll need to be organized and confident. Just as important is knowing what you're asking for specifically. You can't just walk in and ask if they'll sponsor your club. You need to come with a specific ask. For example, your club votes on a small project, you then write up parts list for it. You can take this to a hardware store, or a local hobby shop and have a much better chance of landing help. Even if they're selling you parts at cost, that could be a huge savings for you.
1 Find people
2 Organize meetings
3 Choose and carefully outline a small project
The more research and organization the better your chances of sponsorship.