Welcome to Bike Forums.
Since you're a bike newbie I'd suggest you get your first bike from a bike shop. They'll probably have to special order the bike. They can do the fitting and make sure everything is dialed to you.
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The Lord is merciful and gracious, slow to anger and abounding in steadfast love. - Psalm 103:8
I am a cyclist. I am not the fastest or the fittest. But I will get to where I'm going with a smile on my face.