In hypertension guidelines, beta blockers are not even 4th in line anymore for treatment. First 3 classes used are ACE/ARB, calcium channel blocker, and thiazide diuretics. It is the correct move based on evidence. Expect some higher heart rate, maybe jitters for a few days, headache, sweating. You can ask about weaning depending on how high the dose of beta blocker was

Expect a low level of postural hypotension at the start of ACEI treatment. Basically, your BP drops when you do a sudden standing from sitting or laying position. For that reason, ACEi are generally given at night when you don’t have to do much standing up. Not all people have that side effect, and even if you have it, it will only occur at the beginning few weeks of treatment. Afterwards your body will adjust to it. The other thing worth mentioning would be unexplained dry cough .

Your medical history may have changed over the 30 years and newer research may have shown an ACE to be better overall. Ask your physician.