Hello @Temo2 and welcome to the community!
I know Arabic so I translated your message. Kindly post your future questions/feedbacks in English so we can assist you, this is an English based forum.
And for your question: yes, you can perform a software repair at home easily. All you need is a USB cable and a PC or Mac with Xperia Companion.
This procedure will do a clean installation of the latest firmware and will also wipe your internal memory. Don't forget to backup using Xperia Companion, but preferably without adding apps or settings to the backup.
After installing Xperia Companion, follow this guide: software repair using Xperia Companion.
Keep us updated if you managed to do it successfully. And don't hesitate to reply to this post or send me a private message if you needed more help.
