I think it’s lovely, but your opinion matters more than mine

A few examples:
My grandma had a small desk in her living room that had multiple statues, holy cards, candles, and such on it. Some would say it was too cluttered. But there was something homey and comforting about it, probably because it was grandma’s and I loved being with my grandma.
My son’s godparents have a small, old wooden altar from a church in their home. They have a linen cloth on it, the family bible, and two large pictures on it: the Sacred Heart of Jesus, and the Immaculate Heart of Mary.
I have a round end table that I got at a garage sale. I covered it with a large crocheted doily, made by the local Poor Clares. I have a small statue of Our Lady with the Child Jesus, and my Liturgy of the Hours books on it. I never thought of it as an altar, per se, more like my “prayer table”
Your personality, your prayer style, even when and how you use your altar will determine what’s on it and how it is arranged. I think the important thing is that you’ve gotten started.
God bless you!
Gertie