I'm 25 and wondering if a facelift will solve my problem?

Although I hesitate to recommend a facelift and someone as young as you are the maneuver you did with your hand to pull your facial skin back does reduce your challenge and clearly would give you the improvements you’re looking for.
An angle jaw implant is the very best solution to providing angle definition. A small Genioplasty advancement or chin implant will also add balance snd definition.
Lastly your photos do not show your bite. If you are Class II with skeletal mandibular hypoplasia orthognathic surgery with mandibular advancement would add more volume and Genioplasty would not be necessary.

At age 25 without extreme weight loss your problem is not skin or tissue laxity and so facelift would only give temporary improvement and is not the right solution. The jowls and neckline could be improved with liposuction a d the cheeks with filler fat or an implant.

Greetings thanks for your question
İn your age i would not recommend you a face Lift surgery. Maybe Thread Lifting can help you out.

You can't 'facelift' your way in to a better jawline appearance. You either have good bone structure or you don't. A facelift is only gong to make that more apparent. And as you have already learned a chin implant is not going to improve the shape of the jawline...it is just a chin projection procedure. What you are actually seeking to solve the entire jawline issue and which will also have a bit of a facelift effect is a custom jawline implant.

It is always important to consider the bone structure and you have an underdeveloped lower jaw which now has only augmented the 'front. So augmenting the angle and body is necessary for your goal. The imbalance of the chin implant itself could be improved