Installing Ubuntu 18.04 on USB

System info:
OS Microsoft Windows 10 Home
Model systemu N85_N87,HJ,HJ1,HK1
Procesor Intel(R) Core(TM) i5-7300HQ CPU @ 2.50GHz, 2496 MHz, Rdzenie: 4, Procesory logiczne: 4
BIOS version American Megatrends Inc. 1.05.22, 27 mar 2018
Wersja SMBIOS 3.0
Tryb systemu BIOS UEFI
Secure boot disabled

I'm learning python and I really want to use ubuntu to code. Once I bought my notebook I tried to install both Ubuntu and Windows 10 on two different drives (SSD for windows, HDD for ubuntu). Unfortunately it all went wrong and I was stuck with working Windows and some remains of older, unsuccesful ubuntu installation (i.e. I still have option to choose GRUB as a primary boot). Recently I've decided to invest into nice USB stick so I can use Ubuntu from it. I bought Patriot Trinity and tried to install Ubuntu 18.04 on it via UUI. I tried to do it today but I recognized same error that occured during first attempts of installing Ubuntu 6 months ago. I install it, reboot, change default boot to USB stick and after choosing "Try Ubuntu without installing" everything loads and then crashes, at first it loads "desktop" that freezes after couple of seconds, and after second boot it doesn't even bother to get pass the Ubuntu logo loading screen. What do I do, will I be able to successfuly use Ubuntu on my notebook or should I stop trying and accept my defeat.

Thanks in advance :)