Until you get your BF down under 20% I would avoid SARMS. Might get away with Carderine or Clenbuterol, but taking things to boost test levels while at that high of a body fat will increase the chances of excessive aromatization or in other words conversion to estrogen. I know everyone says SARMs are not known for this, but ultimately it wouldn't be the SARMS causing the problem it would be the fact that your testosterone is higher than normal and with high body fat it becomes easier for the body to convert testosterone into estrogen.
Work on your diet and getting to the gym for now. Once you have those programs solid it will not take long to get your BF down to where you can start to use PED's.