I don't want to assume anything, but from your post it seems like you have a lot of learning and researching to do before you are ready to blow clouds...especially if you are looking to get into mechanicals and rebuildables. But to be fair and answer your question; the "clouds" you see from YT videos are mostly from people running mechanical mods and sub-ohm (under 1ohm) coils. There are a lot of people on this forum that seem to be against sub-ohm
vaping, but only against people who do not know what they're doing. It might come across as "hate," but basically we're all here to help each other out and protect our vape community from any unwanted press.
Do your homework and stay safe.