1st Deal and Confused

Hi. I'm trying to get my 1st deal done. I have 2 hot properties in southern CA both listed at $450k with $20-25k each in rehab and both ARV $600-630k. They are REO and pre-trustee sale. They are asking for proof of funds and letter of intent. Can you please help me thru this? I'd be ecstatic to make even 1 of these happen and even happier if I could get $10k out of each. Can you please give me some direction?