I have a great dermo whose PA prescribed Retinol-micro(.04%) for anti-aging. Did some research and asked instead for Renova .025% (I'm more on drier side). I have great skin, aside from a rare hormonal pimple/ blackheads/sweat bumps, so I'm terrified of my skin breaking out/getting worse. I eat/live very healthy and don't want any surprises. I'm prepared for dry/redness, but how long/how bad, what can I expect at first? Planning to start once/twice a week and working up to more, Worth it?