Very bulbous and droopy nose tip. what can be done? 21yo male. What can be done and what expectations should I have?

The pictures are not very helpful because they don’t show you entire face and are of poor quality. It looks like you have a nasal hump and the tip is under projected. A rhinoplasty could remove the nasal hump and increase your tip projection. Further refinements can be made to your tip. An examination and of better pictures could confirm these suggestions. 

There are a number of options for those with a droopy and bulbous nose tip. A traditional rhinoplasty will provide precise and long-lasting results. With recovery time usually taking two to three weeks, you must keep in mind that a traditional rhinoplasty is still a significant surgery that uses anesthesia and incisions to permanently reconstruct your face.
However, some non-surgical options may be worth trying for patients looking to lift a bulbous nose tip without surgery. It is important to note that while a non-surgical rhinoplasty does not address a bulbous tip, by injecting the dermis with fillers and Botox we might be able to temporarily tighten and lift a dropping tip, without the pain or recovery time associated with surgery. Results last for up to 2 years following the non-surgical rhinoplasty, at which point your nose and facial skin tissue will slowly return to its natural state as it was before surgery.

The views you posted show a nose with a few strong features. There is the bump on the bridge. There is the bulbous tip, as you pointed out. The tip of the nose is strong in its forward projection away from your face, so moving the tip and the entire nose back closer to your face can help in making the nose less prominent. Finally, the tip sits low, and can be elevated upwards, still keeping the nose strong and masculine, but looking like all the parts fit together. We get all that figured out before surgery, by making and adjusting morphs to fit the patient's preferences.
Remember that rhinoplasty is an exquisitely difficult operation to get right, and you should only have surgery if you are able to make yourself very confident in your surgeon's skills. The changes I described above require advanced techniques. For most noses, it's much better to not have surgery than to have inexpertly-performed surgery. Read my essay on how to stay out of trouble while selecting a rhinoplasty surgeon. 
Your nose is also a perfect example of why computer imaging is mandatory in rhinoplasty. You need to know exactly what the surgeon is planning to accomplish -- what features he thinks he can change, and by how much he thinks he can change them. I always email morphs to my online rhinoplasty consultations. When you see the surgeon's goals in the morphs, you'll know whether he has an eye for an attractive nose, and whether he shares your opinion of what constitutes an attractive nose. You'll also know whether the changes he proposes are large enough to be meaningful to you, and whether he understands your wishes enough to address all of your priorities. How would you ever get that figured out without the morphs?!