First subcutaneous injection — what do people wish they had known?

Not asking whether to. Asking, from people who have done this a lot, what the gap is between reading the guide and doing it.

The honest gap, in order:

It hurts far less than you are expecting. A modern fine needle into subcutaneous fat is mostly nothing. The anticipation is the worst part and it stays the worst part for about a week.

Your hands will shake the first time. Everybody's do. Sit down, elbow braced on something.

Slower going in than you think, then a pause before withdrawing. A couple of seconds. Reduces leak-back at the site.

You will second-guess whether you did it right. You probably did.

Adding: set everything out before you start. Everything you need, in order, within reach, and a sharps bin open.

The moment people improvise is the moment something touches something it should not have — a needle put down "just for a second" on a surface, a stopper set face-down. Every one of those is avoidable by having the sequence laid out in front of you first.

And read the site problems guide before the first one, not after something looks odd. You want to know what you are looking at while you are still calm.

And do not do the first one late at night when you are tired and alone. That is not squeamishness, it is that if something does go wrong you want to be alert and to have somewhere open to go.

The "lay everything out first" one is the sort of thing that is obvious afterwards and not before. Thanks all.

Also worth saying, since nobody has and the guides do: the compounds most people are doing this for are not approved for human use, and the technique being correct does not change that. Doing something carefully and doing something with a known risk profile are different achievements.

Not a lecture. Just the thing the guides say about themselves in their own introductions, and it belongs in this thread too.