Hi Manny,
There is no con to using an agent to buy your 1st deal. We are free to you, the buyer. THere's more con's in not using an agent, the main one being you won't have someone representing you and getting you the best deal possible. Agents are fiduciaries and market experts.
I would not recommend using the seller's agent, because they have the seller's best interest and can never fully give you an unbiased opinion when trying to close a deal.
Not sure why you would want a lawyer to close the deal. There is a lot of knowledge that an agent would have that a lawyer would have. An agent can help guide you through the process from showing homes, running comps, writing competitive offers, walking you through the escrow process, helping you understand the results of the inspection, and making sure you close on time.
My advice is to get pre-approved, see what you can afford, then look for areas with solid price to rent ratios, so you can have that as an exit strategy. It won't cashflow right away, but give it a couple of years and it should. Also look for a diamond in the rough, that needs a little bit a rehab if you have the budget/time for it. That will help give you some forced appreciation.
Condos are great point to start with because the HOA should cover the major repairs (Roof, Plumbing, Foundation, etc.) They won't appreciate as fast as a house would, but they are way better than renting in my opinion. Make sure to check HOA rules as far as renting it out after, and make sure that it's MidTerm Rental Friendly, which most HOAs are.