@Adriana Rego It's very important to learn as much as you can before taking the plunge in using IRA funds for real estate investment. I use Fidelity for my Self Employed 401K and IRA and Pensco for my Self-directed IRA. I still invest in traditional markets and send funds to the SDIRA to buy real estate and other alternative assets as needed.
Start learning by reading about Self directed IRA from reputable companies. Many of these companies have recorded seminars that are informative. There is a book available on Amazon written in 2013 by Sorensen that may be helpful. The self directed IRA handbook.
As I mentioned before - I used a portion of my previous employers 401 (sitting in Fidelity) to rollover into my SDIRA with Pensco, purchased small rental income homes, sold, and now hold notes. I also hold land and other assets. The land will be built with multifamily within the IRA to generate rental income in the IRA. I anticipate I will begin receiving distributions from the IRA in the next three years or so (and then begin paying Uncle Sam).
The reason to become educated is so you don't inadvertently make mistakes in self dealing - which would invalidate the tax status of the investment. Your IRA Custodian will guide you but you need to make sure you understand all the nuances as well.
I am a big advocate for SDIRA - its a great wealth building tool, but its only 1 tool. Good luck!