I have finasteride (propecia) side effect. 6 Weeks on 0.5mg, prev. took 0.25mg for 2 weeks. Advice needed Please.

For the past 6 weeks I have been taking 0.5mg ED and noticed that I get spontaneous erections less frequently, my erections feel 'softer', it's generally more difficult to get a full erection, I seldom get NPT now whereas I got it very often before. I want to maintain and regrow my hair. Mild thinning and miniturization at the hairline and crown. What's your advice for me in this case? If I carry on taking finasteride do you think that these sexual side effects will eventually go? Many thanks.