Hey @Lauren C.
Before anything, I would say to educate yourself by reading a few books, listening to some podcasts or attending meetups if you can. Its a lot harder to get taken advantage of if you know what you're doing and know what's right and wrong.
I personally recommend that you start looking into out of state investing and begin vetting possible markets to jump into. For example, properties in the midwest markets are priced lower than those here on the coast, you can usually find a distressed property in a C+ and above neighborhood for about 70-120k, sometimes more or less, depending on whether its in a C,B or A neighborhood. Rehab can vary on how distressed the property is, we've had rehabs for flips around 40-80k and at times even lower or higher and rehabs for rentals ranging from nothing needed or 10k to up to 50k due to the amount of work required or if there was an issue with the contractor. You can even find way cheaper properties in these markets if you decide to venture in to D grade neighborhoods.
Your best bet would be to look into out of state honestly. It takes a lot less money to be put upfront, and you have a higher chance of obtaining a cash flowing property out there. If you use a hard money lender, you can possibly spread your 400k between 5 or so properties and possibly even more if you aim for D grade neighborhood properties.
If you're anxious and a bit afraid of investing out of state, look for a partner that has experience in a market you're interested in. If you have capital and no experience, find a partner with experience, a track record, boots on the ground and who might need extra capital (such as your 400k). Although make sure to ask as many questions, vet them properly, get it in writing/contract and to verify the info they tell you with other experienced investors.
If you have any other questions feel free to reach out at anytime. Hope this helped!