CathInfo.com

Are there any threads on this topic already? I am looking to slowly make a dedicated altar in my room. Currently have a few icons, of our Lord and Lady and my patron Saint.

A freestanding crucifix and a pair of candlesticks or candles in a glass.

You might get some ideas here
https://www.cathinfo.com/the-sacred-catholic-liturgy-chant-prayers/repurpose-entertainment-console-into-a-home-altar/

Here it is, in its most recent incarnation:






It's kind of asymmetrical, but I have to work with what I have, in limited space.  The Quebec Sacred Heart flag is to cover secular knicknacks on the chest, and the panel on the right side is more repurposed upholstery fabric affixed to a plywood scrap I had. 

The symbolic "monstrance" is made from a reclaimed rubber stamp tree they were throwing away at my old office, with a circular Sacred Heart plaque where the Blessed Sacrament would be in a "real" monstrance.  The rays are the arms that held the various rubber stamps.  My father made this.  He also made the picture gallery of several traditional Popes from a frame salvaged from a military recruiting office.  It's kind of rustic.  (That's okay, so was he )

The candles are ascending where they should be straight across, but it's all I had, my aunt gave me some candle holders.  (Or I could always just flip the candles on each end, short ones in the tall holders, tall ones in the short holders, leave the middle ones as they are, trim if needed.)