Raul--
Welcome to the community... you've already started to discover the many people who have helpful advice for you, as you wander into this world. I'm a DL who discovered my love for diapers in the early 70s--- WAAAAAY before the internet, and anything like this (or any) website-- so I'm telling you: Live The Dream!
You've already started to figure out what your particular diapering needs are, for your particular needs. Everyone's a little different... you're well on your way.
But about the "are people noticing that I'm diapered?" question-- let me be the first to address that one:
Generally, NO. Not at all.
It's not people's first thought. They're complete, random strangers on the street-- you're in and out of their awareness in 5 seconds. Whatever fleeting impression they may have noticed of you will be gone in 15 seconds. Your diapers are such a random, arbitrary possibility to them-- you'd pretty much have to bend over and flash them a backside-waistband shot to make them aware that you're wearing diapers.
Seriously. I've been wearing diapers in public under my jeans (not for need-- just for I don't care) for 15 years. I've never been aware of anybody paying any attention. Never! Even when I first started wearing them out in public, and I was hyper-aware of other people-- NEVER. It's never been a thing. PEOPLE JUST DON'T NOTICE IT. Even super-crinkly disposable diapers-- no, I wouldn't wear them in a quiet environment, but in an out-and-about public situation it's pretty safe to say nobody will notice.
Raul-- it's pretty simple: Just don't let anybody actually SEE your diaper, and nobody will suspect.
At the very worst: If your diaper actually starts to SMELL? People won't think "diaper"; they'll just think "BAD PERSONAL HYGIENE". (But you, personally, should have changed a LONG time ago.) Seriously-- "he's wearing a diaper" is a really, REALLY random bullet-point for most people to arrive at.
In summary? Put on your diaper... pull on a comfy pair of pants over them... and get out into the world, without paranoia. Nobody knows-- or cares.
Hell-- after I post this, I'm gonna change into a dry diaper (Bambino Bellissimo and plastic pants) and head out to a bar to see a friend's band. Lots of beers, no worries.
cheers... and have fun!
Mark.