& how the swing motion works, how the hands set with the rotation of the body
folks often don't, assuming they are not yet good enough to merit going for a lesson often times feeling embarrassed some, should this be a thought don't pay it any mind, as the Pro will have seen all kinds of efforts to strike a ball before
or they assume because they played a bunch of sports relatively well taking up golf will be the same
for most folks that's not the case as golf is counter-intuitive
so to save the hands & not pick up a bunch of bad habits that the more balls you hit the more that will ingrain them deep guessing many folks on the forum can attest to just how hard swapping bad swing habits for ones that will make the ball go in the direction you want more times than not
this issue is normally around a bunch of things, grip pressure leading to having to release & re-grip, & or just how the hands/wrists set if they being set a little ways wrongly that too can cause a let go & re-grip just where the handle is lying in the hands too much in the palm will also tend to lead to letting go & re-gripping so lot of unwanted friction between hands, fingers & also the handle which all leads to a swing motion that doesn't deliver the sweet spot to the ball, further away from center the ball is struck the more the 'face' twists so the handle in the fingers
those things will still tend to give you issues whether interlock, overlap or baseball (10)
you imagine a pressure scale 1 through 10 - 10 being strangle generally a grip pressure of around 5 is a good ways to go.
start off 8,9 or 10 & folks cant keep that 'hold' at the top of the swing the hands will automatically loosen so you get fricton
start off at around 5 at the hands will naturally tend to automatically 'firm up' so keep a good grip pressure throughout the swing
but whatever pressure or grip 'style' the handle has to be in the correct area of the hands & not real high up in the palms - beginners often times have it too much up in the palms as it gives a false sense of 'strength'
if you have small hands or still in school then sometimes baseball hold can be useful - my take if possible would try to learn a good neutral overlap hold - best ways for that is with some lessons.
meantime here's couple links to good grip videos
left hand grip
right hand grip
