Is keto a good option for me?

Hi all. Long time "lurker" on this sub reddit and I just want some help on this matter becaus, tbh, I'm in doubt if keto (ketogains) is appropriated for me.

About me, I weight 70kg and have 175 cm, I don't have any health issues that I'm aware of, besides spring allergies. I do workout at the gym 3 days of the week and swimming 2 days of the week.

I've tried keto in the beginning of the year and although I felt great, I was underweight because of the sacited feel of the food. So I addes some good carbs back in like fruit and quinoa. But when I add them I feel a bit sluggish and experienced some trouble sleeping at night, not sure if related or not.

Saw ketogains and did the macros, not sure if corrected or not but I choose to gain muscle since I have a good weight for my size ( since I don't know how to measure, I choose the 15-17% body fat, since the picture is more or less how I am) but I'm really not sedentary (work as software developer), besides working out I also take my dogs on a walk, around 15-30 min walk so I'm not sure what to choose in that question but I went with lightly active.

So after this wall or text, and 2 days in, I just wanted a bit of help if this way of eating ( not a fan of the diet word) is good for me or should I continue to eat fruits and quinoa as a primary carbs (oats really mess me up).

Thank you so much for reading and helping.