@Manuel De La Cruz Are you using the C-Corp as your property management company, only, or did you also purchase or transfer the property into the C-Corp. The problem with C-Corps are that they pay corporate income taxes and then when you pull money out of them, you have to pay taxes again. Also, if the C-Corp generates losses, then those losses get hung up in the C-Corp to offset future income of the C-Corp and you cannot use them on your personal tax return. So, I recommend that you manage it carefully to make sure that you run as close to breakeven as possible.
The second issue with any corporation (including LLCs filing as S-Corps) is having the corporation own rental real estate. There are two parts to this issue. The first part is that if you want to move the property out of the corporation, then you'll have to pay tax on that transfer. Meaning, that if you want to move your property into another LLC that you own, you will have to recognize a taxable gain on the difference between the fair market value of the property and your adjusted basis - even though you did not actually receive any cash for the sale. This event will also occur if you elect to revert your LLC/S-Corp back to just an LLC. The second part is that you do not get debt basis for corporate debt. So, if you have an S-Corp and have a mortgage on your property and the rental has a loss (or you do a cost segregation), then you will not be able to deduct this loss once your capital basis is depleted. For those of us buying with no money down, this is a serious problem. You are not "at-risk", so you have nothing to lose (according to the tax rules). These losses are suspended and you get to offset future rental income from the S-Corp in the future.
So, to your question about accounting tips for getting started, you don't have to spend a lot on software. Setting up separate checking accounts for your business is the best way to keep your business expenses separate from your personal expenses. You can use spreadsheets to manage your budget and books, initially. However, as you grow these will get unwieldy and will cost you more time to maintain, probably to the point where you keep putting off the bookkeeping. So, I recommend getting a low cost accounting software solution, so that you can learn how to categorize transactions while you have some time to learn that and, as you grow, you'll build data to help analyze your business. For landlords, an good solution is Stessa and for any other business, a good solution is Xero. Both of these are cloud-based software packages. To make Stessa easy, you can setup a checking account for each rental property you own and link those transactions to the property in the software. Xero allows downloads from your bank and credit cards to help with data entry. A lot of my clients use these packages, and also QuickBooks (for general accounting) and Buildium (for rentals). If you will be scaling quickly, then you may want to consider upgrading to these packages sooner.