Last night I was welding 1/4" x 1" mild steel with a 6011 rod, First time using this rod well on one weld the rod was glowing red. I would like some info on what was I doing wrong. I'm not a expert welder!!!!

What diameter rod were you using and at what current setting?

Yep sounds like too small and/or too hot.
Ken

yep too much current for the dia rod you are using.

1/8"dia rod run around 95amps, tweek as needed. 3/32"dia rod run around 65amps, tweek as needed. The 3/32" rod will get hot faster and burn the flux off when you have used about 1/2 the rod. I HATE this size of 6011 for this purpose. You can use a 1/8 rod on this size material easy, actually I think it would be better to use the larger rod. Let us know how you make out.

To high of a current seems like

Just a note, welder are differant, Just cause it says 90 on the plug in or dial don;t mean that is exact amps.
Also AC and DC rates are differant. Start low (on scrap) tweek till it burns good for the rod used. Keep notes.
Had a neighbor stop at my welding shop. Wanted to know why his welds on his mowers wern't working. He was using
3/32 dc rod and got some 3/16 7018 AC running at the same amps.
Ken

It`s my understanding that 6011 was developed for AC machines.If you have a DC machine then 6010 is a better choice.
Whatever supplier you get your rod from should have small handbooks that will give guidelines for appropriate size and type rod for a project.The same book will tell you approximate amperage and whether to run a DC rod either electrode positive or negative.Welding suppliers usually give these handbooks out for free or at little cost.
Lincoln Electric also puts out a lot of low cost books related to all types of welding and welding projects.