"Currently getting infusions every 3 weeks and have chronic arm and leg itching coupled with insomnia."
Cannabis can help make cancer treatment more tolerable. For insomnia, I recommend either an indica strain which will cause drowsiness and sedation or a 1:1 CBD:THC which is milder in effect. For itching, I recommend applying a topical cannabis lotion or salve directly on the areas of itching, as needed. Best of luck to you in your recovery.