there are so many elements to consider before I could answer what you should do.
anything from input levels to style of playing to type of music you are making. what about panning and automation? do you actually think your mix is missing something?
if you think it sounds good go check your mix in your car or other places people listen to music like a mobile phone. IF you are happy with your mix it shouldn’t be necessary to add any more effects should it?
Youtube are flooded with recording and mixing techniques, you just need to find something you can trust that fit what type of music you are doing.
BUT in general I would must certainly use plugins on my original tracks. EQ → comp → distiortion → chorus → delay … the options are massive and all depends on what kind of processing you use while recording. and ofcourse the mixing of guitar tracks are depending on what other sounds are in the mix as you need to make room for all of it.