@Michelle Cuggy
1) You can't purchase an investment property with 3.5% down. The lower down payment options are for owner-occupied homes. Most true investment property loans are 15-25% down. Most people start with house hacks because you can put 3.5-5% down on a primary residence and then eventually move out and make it a rental property.
2) You can find wholesalers by attending REAI meetings, meetups or finding them online. I will warn that most wholesalers only want to deal with cash buyers and most will want to work with investors that they feel have experience to close the deal. I don't typically recommend trying to purchase assignment/wholesale deals for your first home. They usually need a lot of work, don't offer much due diligence time and often require non-refundable deposits.
3) It is normal to view a house more than once. You can take a contractor. In our market, 2 showings is totally acceptable. 3 is a little much. More than 3 is very uncommon. Usually, a 2nd showing is done to confirm the buyer really wants to make an offer. I would recommend 1 general showing. If you really like the property, then take your contractor for the 2nd showing to confirm a general rehab budget.
4) It's recommended you talk to a lender before you start hunting. Ask for a pre-approval letter. They will pull your credit, gather some initial financial information and give you a general estimate on what you can afford. Most sellers won't entertain an offer without it, so it's important to do that ASAP.
5) You can try to gather as much information as possible on sites like Zillow, but the historical sales date is difficult to find. You'll usually need a real estate agent to help you comp the home because we have access to the sold records in the MLS. You can also use the tax records, but they're not easy to navigate. This is one of the reasons I would recommend you have an agent assist you. Especially when you're new and don't have experience with the contracts and protocols of the sales process.