How can I make Kali Linux connect to Bluetooth on startup?

I've an old computer where I have installed kali linux on. The said computer has no built in keyboard so I have to use a bluetooth keyboard (I know I can just buy a wired keyboard but a wireless one is a lot more convenient within the context of my old computer.). The keyboard, under normal circumstances, connects just fine after I've enabled bluetooth via sudo service bluetooth start and saw on the internet that I can automatically enable bluetooth via the sudo systemctl enable bluetooth.service command. It seems to have worked but it still cannot detect my keyboard on start-up, so I can't en

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