Awww, look at the little baby! So cute.
What's up
@suninthesky123 
Welcome to Bluelight and welcome to the world of psychoactive substances. We're happy to help you out dog. I just had to give you a little bit of lighthearted ribbing. You're in the presence of some of the world's most experienced junkies.
First, there is no reason to insufflate (snort) Melatonin. Furthermore, Melatonin is not a psychoactive substance. It does not produce psychological or physical effects in that way. It is useful only for inducing sleep and taking it orally gets the job done just fine
Your pills contain Methylphenidate (Ritalin; Concerta). Methylphenidate is similar to Amphetamine, but weaker in terms of its effects. If we look at all possible stimulants on a spectrum, we might put Green Tea on the far left, then Coffee, then Ephedrine, then Methylphenidate (it's a pretty huge jump from Ephedrine to Methylphenidate), then Amphetamine, followed by Methamphetamine, the latter being regarded as the strongest stimulant commonly available.
You describe how your focus is affected. This is pretty much textbook. If you look at Meth addicts for instance, you will see them experiencing the same thing to a much greater extent, perhaps scanning the ground like crazy, putting things together and taking them apart etc. This gain in focus is what leads students and workers to use the drug to enhance performance. This leads them to be more focused on material that they otherwise wouldn't have been interested in.
If you took 110mg Methylphenidate in a single sitting, I would expect you to be pretty geeked out and not necessarily in a "fun" way. I wouldn't take more than 60mg Methylphenidate at once and I'm like a garbage disposal for drugs. Past a certain point, the desired effects become overpowered by the physical side effects like palpitations, sweating and anxiety.
You're not doing anything unsafe though. Let us know if you have any questions.