I have taken Sotalol 9 months to Control aFib and took propranolol for 40 yrs before switching. Beta blockers have reputation to cause fatigue. I do get tired mid afternoon & quick nap perks me back up. Otherwise, I have plenty energy. Regular exercise helps energy level normal. As for blood thinners, anyone w aFib must take them to prevent stroke. I have taken warfarin 10 years and no issues. Eliquis is preferred by my cardiologist but I had mitral repair and can’t take DOAC’s. No studies to date with valve issues to safely take Eliquis, etc. I have had no bleeding issues to date and have home monitor to check INR every 3 weeks. Hope my history helps calm your fears.