"Warm up" is a bit vague. You might just need some EQ - more low end? Cut some highs? I haven't noticed that warmth is an issue with your recordings.
The Oeksound Soothe plugin is really nice for taming edginess, not free, but there's a free trial. Sometimes what people add for "warmth" is saturation. Here's a free one (haven't used it myself)
https://www.softube.com/saturationknob