Absorbency is important when it comes to tampons in general. But when it comes to tampons for beginners, other factors also come into play, such as shape and grip, the latter being especially important. Until you get the hang of it and can just pop a tampon in without even thinking about it, you're going to want an applicator that makes insertion as easy and as comfortable as possible.
Considering these features as "must-haves" for beginners, fiber scientists and gynecologists found that Tampax Radiant Plastic Tampons are the best tampons for beginners (via Good Housekeeping). What makes these tampons so great for newbies is that they tested high on the comfort scale, have a plastic applicator that includes a grip for easy insertion, and include resealable wrappers for those who want to keep their tampon disposal on the down low and super discreet. They are available in regular, super, and super plus absorbency, so there's a size for whatever type of flow you have.