android studio sdk messed up

i'm trying to install android studio. i downloaded it from this link: https://r5---sn-p5qs7nzk.gvt1.com/edgedl/android/studio/ide-zips/2021.1.1.21/android-studio-2021.1.1.21-linux.tar.gz. i also downloaded the sdk from here: https://dl.google.com/android/repository/platform-tools_r33.0.0-linux.zip. i untared android studio and in the bin folder, i ran: chmod +x studio.sh && ./studio.sh it bringed up the android studio wizard &... when it got to the sdk part, i couldn't select android sdk tools because it said (installed) but it isn't. i know what you might say: Android Studio comes with the sdk!NO! IT DOESN'T! when i try to change the sdk directory it says: Nothing to do! Android SDK is up to date. SDK emulator directory is missing. what should i do?