1850 is to low, but I never suggested that. This is your BMR, that amount of cals you would burn laying in bed. Your activity multiple of 1.55 however is high imo. Again this will depend on your job, but if you don't have an active on your feet all day job, and you aren't training every day then 1.55 is high. We over estimate our activity levels.
Even using your BF guestimate of 20%, with a moderate activity calc of 1.25, only brings you out to 2275 to maintain. To bulk you don't need to go crazy with the cals, anything extra that doesn't go towards building muscle will mainly just to towards building fat.
So with this in mind, start with a lower excess of maybe 10-15% over your maintenance amount and see how quickly you gain weight on that. So around 2650, which is far lower then your 3300.
You will still make progress during these relatively newbie periods. Expect to add around 0.5-1lb (very maxium) of lean body mass per month. Its pretty much an expected standard that naturally the amount of lean mass you can put on is around 6-8lb of muscle per year.
Also don't use scales so much to monitor progress. It is entirely possible to lose fat and build muscle especially during these newbie periods again. Which again reinforces the need to more accurately measure your BF%, which is hard to do, given that pretty much every method has a variance of 10%-30% except for hydro static measuring.
