just take a cup and get a little bit of the tank water and put the pellets in it for about 5 minutes, then pour it into the tank, they will be softer and easier to eat. he only needs 2 in the am and 2 in the pm, more than that and it can cause constipation and other problems, dont overfeed. the shrimp, i would only feed once or twice a week as a treat.
and he/she will probably color up greatly in a few weeks. i have a male that looked like yours when i bought him, pale, now he is intensely purple and burgundy, i cant believe its even the same fish, lol
good luck, and welcome to the forum