How am I going to look after 2500 grafts? (Photo)

I think your question is whether or not 2,500 grafts is enough to see a difference.  2,500 grafts is an average amount of follicles for a hair transplant.  It isn't enough to fill out the entire thinning region  However, if they are placed strategically you should certainly see a noticeable difference by one year.  Of course you may need more grafts to meet your expectations.  It's hard to know what you expect without a consultation.

You'll be 2500 grafts richer after a 2500 graft surgery but it will not fill out a bald head.  You need well over 5000 grafts to cover a bald head.  Even then, it will not look full with a short hair cut.  You must understand that you may not be bald now but you may be bald one day.

How you will look after surgery entirely depends on the skill of the doctor and good post op care. We cannot tell from your current pictures. You just need to wait for the results.