Had one.

• it's okay to be apprehensive
• use a reputable clinic - Dr Nick will give you PTSD
• it's gonna cost a bit. Ensure you have insurance or a healthy bank situation. It's like us$2k here all-in but we can get it back from taxes.
• it's a long process and there is weird stuff going on. Listen to the practiced pros and warn them you're a noob. They'll understand and ideally warn you which ooky thing is happening next so at least it's not a surprise.
• sometimes the temporary cap pops out if you have one while waiting for the permanent one. As long as you can bring it in to the office, they'll glue it back in in 2 minutes. You want them to glue it back in.

After a period of time you will be totally unaware of it as anything other than a tooth. It's not expected to fall out, split, or receive coded messages.

Breathe.

had ones done with a local only was not that bad just be careful with that you eat as you don't feel it as much if something is stuck downstairs there like a seed or chip. years later had something stuck didn't know it and snapped the screw and lost the tooth without ever feeling it. bended up having to have the tooth pulled and getting a implant for way more money.

Even had the tooth pulled with only a local was not that bad my jaw hurt from holding my mouth open than the tooth than the tooth itself

I've had two root canals. One in 5th grade, and one in college. Local anesthesia only. It was a long painful process. Both teeth eventually failed anyway, and had to be pulled, and replaced with implants.

So my opinion is, if you can afford it just skip the extra misery and have them yank it out and replace it from the start.