Where to ride in CO?

Hey there! I'm a newbie that recently got his first emtb and I'm trying to get out there and finally try out some trails. I know I can probably call local shops or download some apps but I figured it was also worth asking you guys on this sub. I think your guy's knowledge is pretty damn valuable.

I'm along the Boulder-Longmont area. I want to find primarily some easier trails for me to get my footing but I also wan to learn the go to spots/must go's for when I'm more skilled and confident.