Conventional Loan 25% down or attempt to spread Funds Out

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I'm new to REI. Many of the podcasts and much advice says to get started and not to sit on the sidelines forever. I've made contact with a loan officer. I have very good credit and could get together a down payment and closing costs to buy at least something in the 150k range (so maybe 35- 40k). My question is, being new, is this a good route to go? Would I be better trying to learn strategies to see if I can spread my 35-40k out to acquire multiple deals? If so, anyone have recommended strategies that would work for a newbie?

I want to get moving, but I do have some reservations. My concern is that if go conventional, and I don't buy a stellar deal on my first buy, I'll have sunk all my capital, and won't be in a position to refi for 1-2+ years. 

Any input is appreciated.