Check out cocoforcannabis.com Even if you don't choose to grow in a soilless context, it's got great info in the "guides and articles" section as well as "dr photon's corner" - the rest is as suspect as any othe user-submitted forum or grow site like this. Not afraid to point out urban myths like 'mass defoliation' somehow being a good things to whimsically do.
Lots of oversophisticated and useless 'techniques' float around. Some cause a really long vege phase for no reason and accomplish nothing, lol. So, do things well, but simply to start. This way when you try new things, you can better discern whether they are magical nonsense or something truly effective. Even that is quite difficult to be confident about if it's a small effect. Genetic diversity will cause a wide range of results even when you do things very well and in a consistent manner. So, get a good idea of the wide variaty of results that naturally occur, so you don't falsely attribute a huge benefit or cost to new behaviours.
I was completely new to gardening when i started 7 years ago. I hate to admit it, but i was so anxious after planting my first seeds about doing things 'wrong' i lost some sleep over it, bwahaha. That goes away, even if not as extreme or worse. Soon, you'll treat them like red-headed step-children if you don't repeatedly give in to compulsions... condition yourself to be rational, LOL.
don't beat yourself up if things don't go well the first couple grows. If systematic, you'll quickly learn. It's really not that difficult. Most people make it more difficult than it is by not getting out of the way of the plant and thinking they have some major impact on it beyond not screwing up.
There's a lot of weird information going around lately about watering... i'll cover both soil and soilless succinctly...
1) fully satureate, and if it is a soilless grow, you also want 10% runoff or more.
2) wait for appropriate dryback and repeat. Loss of weight is a great way to recognize when and so is depth of dryness up top (stick a finger in).
Causing dry pockets is bad. Superficial watering is bad. Seedlings may be a slightly different context.. but still similar. Partial watering is still a bad idea as roots turn toward greater moisture and will grow up instead of down. You probably won't allow as much of a wet-dry cycle between initial irrigations of a seedling but still not too frequently. To avoid watering a recently germinated seed, i use a humidity dome to retain moisture and slow evaporation (roots don't drink much early, so evaporation is the loss of most soil moiture at this point)
If this ever causes a problem it's either the fault of the medium being poorly constituted with not enough drainage amendment or you are not waiting long enough between irrigations. With high water capacity soil, wait for about 1" deep to dry - learn the weight loss, too. With something that holds less water, like coco coir, you'll re-irrigate when the top starts to change colors (superfically dry) or slightly before that.
Proper constitution:
soils or sphagnum peat moss - 50% perlite or similar. coco coir 33% perlite or similar. If you do this, rootzone is virtually impossible to fuck up. Virtually impossible to overwater unless you sit there and run water through the pot at heavy flow for 15-20 minutes, lol... nobody in their right mind would do that, therefore impossible.. These suggestions are not opinions. they are the proper gas:water mixture for the roots to grow optimally.
A lot of people want to believe this plant is super unique and special. It's a mostly hum-drum potted plant in reality. The best practices of most common potted plants will also apply here. Any product you consider buying, look for an equivalent non-marinjuana brand and you'll likely pay 1/4th the price or less for the exact same thing.
If you want the shortest learning curve, go soilless. When you control everything that enters the pot, it's pretty easy to know what needs to be adjusted to fix any problem seen and avoid those problems in the future. Within 1-2 grows, if systematic, should have nearly flawless plants... some blemishes are inevitable, but relatively speaking superior health seed to harvest is easy to achieve in a short time with fewer unknowns....