The second reason betting focuses solely on the main cards and more well-known UFC men helps mitigate injury risk is that they are more extensively covered by the MMA press. Some undercard fights will not get one story.
There is absolutely NO relationship between value and prices. A 33/1 chance may be diabolical value yet a very short priced favorite may be supreme value. It doesn't necessarily mean that you have more value if you pay more.
Finally, you'll need to set a betting frequency. How many weekly bets are you allowed to place? My personal rule is only one bet a day. You can make any rule, but I suggest that you at least try my method.
Next, betting is to search for a site that allows you to place a bet. It is important to be cautious when selecting the sites that offer online betting games. Scammers can also lure you into their sites.