Fill in the TDAC up to 72 hrs before arrival. I believe it goes live on 28th April. It takes 5 mins to fill in and you get an instant response. Simple.
If you don’t understand this then you shouldn’t leave the house never mind the country.
My embassy told me beforehand not to apply for a tourist visa because we were married with kids. I had to apply for a settlement visa which was granted.
I’ve done it the same day for Singapore and Malaysia. Takes 5mins and you get a response e mail within a few minutes so I’m guessing it will be the same