Welcome to Subeta! There's a bunch of guides below that can help start you off! I also noted your HA is missing its eyes/mouth - if this is not intentional, you can drag the eye/mouth layer higher up on the the worn items list in the wardrobe (above the 'base' layer) to get your facial features to show :)

Useful Links:

What to do on Subeta? FAQ Useful general information for newbies Finding friends (Chit Chat) SubetaLodge (Offsite item database, pet colours etc.)
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