Intake Manifold and EGR Cleaning/Replacement - How hard is it really?

Sorry in advance for the long post.

TLDR: how hard *really* is the intake manifold/EGR replacement/cleaning? How long will it take to swap parts out, assuming I am a beginner who has done car repairs in the past, but has also messed up and needed a professional to "save the day". It seems simple but very involved, and I don't want to end up halfway through tearing it apart or putting it together and end up with a non-drivable vehicle.

Now, for the long version:

I have a 2013 Prius V with about 165k miles I just purchased used.

It has a slight shudder on cold startup but nothing constant.

I am reading online that it should have the EGR system and intake manifold cleaned as preventative maintenance, and the previous owner said he has no record of that being done.

I have been researching how to do the job and it seems simple enough for someone with basic skills but just very involved, and I am worried to get into the project and muck something up or run into a snag and end up without my daily driver vehicle. Lots of bolts, connectors, tubing, etc, just seems like opportunities for something to go wrong when you're tackling this as a beginner and on a time crunch over a weekend, haha.

If I were to do It, I would purchase replacement parts (intake manifold, gaskets, EGR cooler) to swap in, and clean the originals at a later time to be able to get my car back up and running sooner. (RockAuto aftermarket? vs eBay vs new OEM from a dealer?).

However for the sake of my sanity, I am going to try and see if any shops around me will do the EGR valve and pipe cleaning, and then swap the intake manifold, EGR cooler, and PCV valve with customer supplied parts, but I am not hopeful given what I've read about other mechanics saying they either aren't familiar, or it's not worth it. Also, if it's outrageously expensive, I wouldn't be able to do it.

I've done other mechanical work this summer on another vehicle, but I am very much a beginner. While I have successfully done various repairs (motor mounts, CV axles, front lower control arms, serpentine belt tensioner, etc), I have also made mistakes that have caused me to have to pay a professional to fix, or other issues pop up that cause me to question whether I messed something up in the process.

Given the lack of history on the vehicle, and the involvement of this kind of maintenance, what should I do? I am finding a plethora of posts online saying anything from "it's so easy I did it in 30 minutes" to "take your time, it's an annoying job but simple to do DIY" all the way to "it took me days and I'll never do it again". Lots of supportive people online encouraging others to tackle the project themselves, but I don't want to get a false sense of security and end up in a mess without a car.

Thanks in advance for any thoughts or suggestions. Part of me wants to just ignore it until it throws a code, just drive the car. But I do want to maintain the vehicle the best I can to make it last, just feels like a daunting task.

Thanks!