getting sponsors depends on what your plan is...
you need to be organized.
if you want the most track time, stick with endurance events.
AMA has a sponsorship package (it was available back in 1992, it should still be available today) which consist of attendance statistics for each track event. This will help if you are looking for national sponsorship.
you also need to schedule your entire race event for the season. budgeting is the worst part (trying to squeze cash from an empty wallet). Once you make friends with other racers, you can combine resources at each event and share crew duties.
it's hard getting a pit crew or even a sponsor while still in the novice class. i would wait until you get your expert license.
the advantage of AMA pro is the televised events. For experience and low cost, i recommend WERA as oppose to AMA/CCS.
endurance series allows for multiple riders. here is where you can find buddies and relatives to pit with. don't mention this to AMA but I let a bunch of my non-licensed buddies do practice sessions in return for pit crewing duties at certain major race tracks.
also, when you have sponsors, have a spare bike and another team member to get the sponsor's names on the track. I will tell you this, I had the most fun during my novice season. AMA Pro class was cut throat and the privateers weren't as friendly compared to expert WERA. It could also be that I didn't know too many of the AMA privateers. the WERA racers see each other more often and help each other out.
to get national sponsors, you need to look professional. This includes good graphics on the trailer and also nice looking pit crew uniforms. Show your track schedule dates and use that AMA package for attendance stats and check if it will be televised. Managing a team takes alota time.
racing is a money pit. the successful privateers usually have a business related to the sport. if you wanna do what i did, start collecting credit cards and file bankruptcy at the end of your racing career.
and last advice, never go solo... if you end up in the hospital, all your stuff will disappear.