I would recommend starting at 0.05mg and after 1 day up to 0.1mg then 0.15mg and so on. I would not recommend more than 0.5mg per day. Personally I only use 0.2mg and that is plenty for me. Dose it a few hours pre bed and daily.
However why are you even using it? Dopamine agonists have pronounced effects on brain chemistry. You should only use them out of prescription if you have high prolactin levels. I would never just use them for a boost in libido as they are not needed for that. If you have high prolactin then sure use them but only to get it down.
If you want something to help boost your test levels when off I recommend a good tesoterone booster such as Tongkat Ali, Tribulus Terrestris, D-Aspartic Acid and ZMA etc. If you're off cycle you probably need all the help you can get so a combination of 3 or even all of them should help greatly. Then of course are things like tadalafil/cialis.