Boot menu stays at download mode after trying to install TWRP

[Vesk]

Hi, Yesterday I was trying to install Cyanogenmod 13 on my GS4 mini (19195). I am new to installing custom roms, so I searched how to do so and I found this guide - https://devs-lab.com/how-to-install-android-marshmallow-6-0-in-galaxy-s4-mini.html . It says to install TWRP (at the time I didn't know what it actually is and that you can install the rom without it). It says to use GooManager, but there was no such app in the play store, so I searched and followed this guide - How to install TWRP on Samsung Galaxy S4 Mini LTE (GT-I9195) - Galaxy S4 Mini Archive - Custom ROMs, Tips and Tricks . I followed every single step, but it didn't work and I got stuck in download mode. I found a way to get out of it and my phone worked normally. I tried to factory reset it but I couldn't and I got stuck again. I got out again but I realized that I can't open the boot (recovery) menu and if I try to go in it or make factory I get stuck.
Can you help me to get my original boot menu back.