Could I get some beginner advice please?

[Grarea]

A few years ago, I installed UT on a Nexus 5 and a Oneplus One, but I needed Bluetooth, so disappointed, i stopped using it.

I now want to repurpose the Nexus 5 and would love to put UT on it.

Now, since then, it had LineageOS on it and then I must have done something as that doesn't load either anymore, it has then sat in a cupboard for a few years.

I have read a few things that I should do before installing UT but don't know if it is out dated info and I also don't always understand the words as I have forgotten what to do.

I have read that I need to repartition things if I have had Lineage OS, which I tried but it didn't work.
Also, that i need to make sure I have the right Android on it, but I am not sure what that actually means with this phone.
I think there was some other advice I read that I should do first, but I don't recall now what it was. So I got confused as to what I actually need to do.

Could i get some advice as to what order I need to do things please?
It would be great to get UT back on a phone.

On this one, i just want to use it as a controller on my network for Libreelec and Volumio to start with. Then I am hoping to get my Oneplus One phone working again to act as a spare. One step at a time

Thanks.

[MrT10001]

You need to get TWRP (recovery) and flash that to the device.

You need the Nexus 5 repartition tool - you can get it from here. In TWRP, copy the zip file from your PC to the device - it must go to the root of the device, i.e not in a folder and as a zip file.

In TWRP, run the zip file and it will put your Nexus 5 back to stock partitions. Just installing a stock Android ROM won't do this.

To install the stock ROM, use Wugfresh.

Read about it in this thread and note @Lakotaubp s post.

Once all is back to stock, run the UT installer and enjoy UT on an old but good device.
.
Stock ROM's here.

[Grarea]

@MrT10001
Absolutely amazing, thank you very much.
No wonder I couldn't work out what to do.

Yes, I picked one up specifically with the aim of joining in the fun of UT, but life blah blah blah (oh, and needed BT)

OK, sorry, I am much less able than you give me credit for I kind of get stuck straight away.
I have TWRP already, but assume it is an old version, so searched how to download to Nexus 5. I am stuck already.

I can't work out what to do. I have downloaded Hammerhead to pc, then am stuck.
I kind of keep following links. I thought I was following the right guide, but now I can't even access folders on phone when plugged into pc.

[Grarea]

OK, it looks like I need to give up on this. I just can't work out what to do.
I can't seem to do what the twrp guide says.
Then if I ignore that and hope that my TWRP is new enough I can't seem to work out what to actually do.
I clearly am not smart enough to understand enough of the words.

I will do something else instead.
Cheers.