Hi, I'm a 19 year old guy who's already accepted the fate of becoming a bald later in adulthood due to my shoddy genetic inheritance (father bald and most of his brothers too, maternal grandfather bald and mother's brother too). I don't want to become bald while I'm at university though so I'm hoping to hold it off for the next few years at least. Looking at my father's old pics, he probably started balding in his early 30s but I think I've picked up the trait much earlier.
Here are some pictures of my hair now, and a few pictures of me from last year for comparison (at tennis), just wanting comments really or whether I should start worrying now and hopping on regimens soon. Is my hair now more thin than thick? I've also noticed that even though I've not had a haircut at all recently, a month ago I could stick up my hair and sort of of spike it up/keep it upright, however now when I do the same it just falls back down. Any ideas?
before:


Current:




Any feedback would be greatly appreciated!
Here are some pictures of my hair now, and a few pictures of me from last year for comparison (at tennis), just wanting comments really or whether I should start worrying now and hopping on regimens soon. Is my hair now more thin than thick? I've also noticed that even though I've not had a haircut at all recently, a month ago I could stick up my hair and sort of of spike it up/keep it upright, however now when I do the same it just falls back down. Any ideas?
before:



Current:





Any feedback would be greatly appreciated!