Buying property without RE agent

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Hey everyone, i'm still fairly new to this but in the process of reading and educating myself, i was confused about using real estate agents or not. Let's say i found a good multifamily property listed on loopnet or zillow, is that considered info from the MLS? and if so, would I only be able to purchase it using a real estate agent if i decide not to get a RE license myself?

Hopefully I don't sound like too much of a beginner and thanks in advance!