Can't get many outs with a smaller bankroll, make sure the one or two you do get are the best for CFB. Example, best juice or free half points.
Next, do you cap yourself, or follow other cappers? This is critical, if you get a low% of winners, you will be in trouble from the start.
With a limited bankroll, your money management will be critical. If you post up $1,000. Your max play should be no more than $50. But you should normally bet $10 and $20. Do not exceed your bankroll per play %.
Stick with CFB. Do not venture into bases, NFL, NBA, NHL, PGA, chess, checkers, tiddly winks. Stick with one sport, hopefully you have some college pals on the team, or also have knowledge no one else has.
Beware of the marquee televised and top 25 games. These generally have the tightest lines and are hardest to beat consistently. If this is for entertainment, then disregard that. If this is for profit, be ready to proudly announce I have Rutgers +27 this week. Everyone may laugh, until you cash.
Is CFB hard to cap? Yes and no. That is another thread all by itself. Anyone making money on this sport? I am consistently profitable at CFB. Highest winning% of all my sports. Best book? Using only one is a recipe for disaster. Another entire thread question. I would open 2. A sharp store and a square store. Best Wishes...OF