It is. Easy. Just that some find some things easier than others.
Clearly something in what you're doing at the moment isn't working for you. Your resolution lies in the answer to the question why?
Datum I'm using is acoustic guitar fittted with 12-53s. Same principle applies for electric, but electric is more tolerant of thicker gauge and harder pick materials.
[br]Losing the pick or perception of any problem holding the pick doesn't occur as a issue for me, but things you could also try: a [u]thinner[/u] gauge [u]standard shape and size[/u] pick with a [u]serrated grip[/u]. I find nylon or celluloid best, and [u]preferred for strumming[/u]. Dunlop nylon in a .38mm or .46mm recommended for acoustic strumming. 6.0mm or higher if you want to pick some individual strings or arpeggiate notes too e.g. "Hallelujah".
Things which will make strumming harder. Heavier gauge strings. Too thick a pick. A pick made of a less flexible material. e.g. plastic or Delrin (Tortex). Both reduce elasticity and absorb impact shock. If you don't have a secure grip, the pick will move about excessively or you can drop the pick. Too small a pick will offer a reduced finger/thumb contact patch exacerbating this. e.g. Jazz III.
If having tried all of the above using one finger and thumb and it's still not working for you, try a three 'finger' grip. Thumb with index & forefinger. It offers superior stability without the Darth Vader Death Grip. I use it as a matter of comfort and preference. This technique hasn't impeded anything I've attempted to do with guitar or play yet. With it the pick can be held with less pressure yet with increased stability IMV&E. I hold it just tight enough to not drop/lose it, but especially strumming, not so tight for the finger to pick grip relationship to be rigid. I use the same three finger technique on electric with all picks except for the Jazz III.
At 7 months you should be able to self analyse the reason/s you are experiencing the problem armed with the above. Of course, and not intending to be derogatory, reasonably clean dry hands if not already ritualistically observed.