"Could" is a very broad word.
Is it a good idea? Probably not, but there's not a complete amount of information posted about your situation. Is it the best idea in terms of effectiveness and health? Almost certainly not.
Using a SARM alone at effective doses can cause estradiol to drop too low, which can cause depression, joint pain, and loss of libido (as well as, over the long term increase risk of cardiovascular disease, but that probably has little relevance short term.) So running it alone at a dose high enough to have good muscle-building effect has a fair bit to be said against it.
For practical purposes and so far as the body is concerned, the fact that technically the atoms aren't arranged in the steroid pattern makes no difference. The SARMs work like anabolic steroids except for in some cases giving adverse side effects to vision. Little or no safety advantage compared to non-aromatizing injectable steroids. (For example Masteron or Primobolan.)
As for combining with testosterone, little or no safety advantage to stacking a SARM with testosterone compared to stacking a non-aromatizing injectable steroid. Or compared to using testosterone alone at a dose giving equal effect, if combined with estrogen control.
Basically, it would be attempting to shortcut and not safer than various anabolic steroid cycles of equal or better efficacy.