Crypto Bridge exchange is the best place (currently) to buy ALQO. It is a very nicely done exchange I must say.
so cryptobridge is not a straight forward sign up portal? You must download their executable file as per your platform?
Nope, you can just use it as a website, no need to download an executable. Be aware that the exchange is decentralised: they cannot reset your password if you forget it and there is no possibility of 2FA at the moment. This might change if the planned federated gateways can do 2FA.
If you sign up, you MUST write down and keep safe your password. Every day there are people asking support for help when they have lost their passwords. It is your responsibility to keep your password safe, and yours alone.