Commissions vary, and they are negotiable.
You'll possibly find a two-tiered approach. Many agents will quote about the same figure (with some variation) for full-service representation. There are also discount brokers out there who offer more limited services, generally for a lower rate. But you can try negotiating with either.
One note: You list yourself as "Home Buyer." If that's the case, then you probably won't pay any commission. The commission is negotiated by, and paid by, the seller. To oversimplify, the seller lists his/her home with an agent. As part of the listing agreement, the seller agrees to pay x% as a commission. That commission generally is split between the listing agent and the buyer's agent. So, by the time you look at a listed property, the seller has already agreed to pay a percentage commission. That amount comes out of the amount you pay for the property, and is used to pay both the listing agent and your (the buyer's) agent.
There can be a few exceptions to that process. For instance, if you find a house listed for sale by owner (FSBO) and the seller absolutely refuses to pay any commission to anyone (unlikely, but it does happen), then you might end up paying your agent a commission. However, all this should be clearly laid out in the buyer's agreement you sign with your agent.
Finally, you won't save anything if you deal directly with the seller's agent. Remember: The seller has already agreed to pay his/her agent a set commission. It doesn't matter if one or two agents are involved; that commission has been agreed to. And, as a practical matter, you're far better off with your own Realtor representing you.
Hope that helps.