hi, welcome ! wonder if you were also given the tank for them ? not sure about the shrimp, but the guppies are tropical fish and will need filteration, heter, and most important : you need to know about the nitrification cycle ,read up on it as this is the first thing that must be done when starting a tank. To keep your new arrivals alive, if you dont have other tanks , you will need to read everything you can about cycling your tank/filters and in the meantime, you will prob need to do alot of water changes until the cycle is complete. And if you are using tap water treated with chlorine and chlorimides, you will need to us a product which removes them everytime you change water or toxic to fish. also, if you change water with buckets , you need to keep the water same temp as tank so not shock fish, this all depends on your setup and sounds like you are just starting out ...asking is good ,,, reading is optimal in fishkeeping...sorry ,didnt mean to overwhelm ya ,seems like you are trying to do right by them.
perhaps other members can chime in here .
Good luck:hi:
georgie