Can a novice change spark plugs or too risky?

I have a newer Honda Civic with 70,000 miles so probably need to replace them soon. Dealer wants $150 which seems kinda high. So can a novice who has only changed oil try it (after watching it on Youtube) or is it too risky since engine could seize and cost thousands?

4 cylinders are usually pretty easy. Some transverse V6 engines can be a real challenge on the rear bank because they may be close to the firewall under other engine parts which means the engine mounts may have to be loosened and the engine rocked forward or other parts removed to access them. If you have clear access it's pretty easy.

No harder than baking a cake for first time.

Ask for advice from your parts jobber, and a liitle tube of anti sieze and dielectric grease. And get a gapping tool and have him Show you how to gap them Macke sure you get right spark plug wrench from him, too, there are three sizes. :Let engine cool Fully, first. Touch nothing but plugs and wires, do One at a time. Just snug ' em down, not killer tight on an aluminum head. Push wire back on Fully.

If a plug is hard to reach (Open hood At you jobber and show him), you may need two extensions and a U joint. But probably not. They may be in there tight, be ready for that.

With the money you'll save, you may as well get the best, Platinum plugs, that last forever.

I literally just did it for the first time Saturday. I have a 21 year old Cadillac with a v8. On the 8th one I accidentally stripped the plug (thread still stuck in the cylinder). I was lucky enough to get it out pretty easily with an ez tool extractor. Really dodged a bullet. It's really not that hard, just make sure to take your time. Don't pull them off at an odd angle, keep it straight when you twist. Also twist the new ones on with your hand first to make sure they're going on right. Considering how new your car is they should come of pretty easily. They will be hot so do it when your car is cold. Make sure you don't mix up the coils, you could really damage your engine, do them one at a time to avoid this.

Sure, get a torque wrench at Harbor Freight. That's the best way to make sure you don't overtorque them. You can use milk of magnesia as an anti-seize compound. It is approved for use on USAF turbine engines.

A novice can change spark plugs. It's one of the easier car repairs.

You gently pull the spark plug wire off. You use a ratchet with a spark plug socket/ extension. It isn't too hard to remove a spark plug. You then thread the new one by hand and then tighten it down with the ratchet/ socket. Put the spark plug wire back on. It usually makes a small click when it is one correctly (but not always).

Most spark plugs are easy to access. One may be at a tougher angle, but you just work with it. You may have to remove things to reach every spark plugs; it shouldn't be anything major.

It's not at all necessary, but I use a very thin coating of dielectric grease on the inside of the spark plug wire boot before I put the spark plug wire back on. It prevents the rubber from getting stuck to the spark plug after 70,000 miles of searing heat from the engine. It's a fairly common thing for mechanics to do.

Most spark plugs are gapped correctly, but you should always double check before installing them. One size spark plug can fit 50 different cars so it has to be double-checked.

Have somebody show you.
Then you can do it yourself.

It's not hard to change spark plugs if you have a nit of mechanical skill. The fact you are asking instead of just watching the video and doing the job makes me wonder if you should try!
Honda's have a common problem with the valves getting tight and the valves need adjusting every 60,000 miles. If you haven't had the valves adjusted yet just have the mechanic toss in some NGK Iridium spark plugs while doing the valve adjustment you need.

On a Honda, simple. Get a rachet and a spark plug socket, 4 plugs (I recommend Champion brand, tho Bosche are decent as well). I would also makes sure your wires are good (those are another simple repair, just do one at a time to match size of wire) As this is si, ole maitrnce, you should not have any issues.