issues with bitcoin-qt on ubuntu 5

I keep running into the same error even after a fresh install. bash: /usr/local/bin/bitcoin-qt: cannot execute: required file not found. I tried using the chmod command. I'm super new to coding and Linux, so any help would be really appreciated!

First of all, please provide additional details, such as how did you install Bitcoin Core. But based on the error message, are you sure bitcoin-qt located on /usr/local/bin? Depending on how you install Bitcoin Core, you could find actual location of bitcoin-qt using command which bitcoin-qt.

downloaded "bitcoin-26.0-arm-linux-gnueabihf.tar.gz" from bitcoin core website. did the tar command, then ran the install "sudo install -m 0755 -o root -g root -t /home/user1/Downloads/bitcoin-26.0/bin/* " then the command above. should start qt for the first time? or did i miss a step?

I assume you're talking about either bitcoincore.org or bitcoin.org. Anyway, that file is for 32-bit ARM, while Raspberry Pi 5 use 64-bit ARM (with support for 32-bit ARM software), so you better download 64-bit ARM version. It's wrong command. That command means you install Bitcoin Core on /home/user1/Downloads/bitcoin-26.0/bin/*. Here's the full right command (i tested it on Debian),

You are missing the command to install the /lib folders too, I think. It looks like it can't find any of its libraries. So repeat this command but replace "bin" with "lib" and then Bitcoin Core should start properly.

Is it really needed? I don't remember seeing any guide which state to install file on lib folder. Bitcoin Qt also run fine on my Debian device even though i only install file on bin folder where it can start sync.

libbitcoinconsensus.so in the /lib folder is required to start Bitcoin Core I think. It's a fairly recent development.