Meanies should have given you a meter... mind you I bought mine without even asking them.
It's fun too kind of empowering feeling and will appeal to the experimenter in all of us. It will surprise you what you can and can't eat then you can make a table of acceptables, no-no's and 'treats' etc.
I too have been under the gun for BP and cholesterol... these all go together it seems. That said it is surprising how little practical help there is out there for what is an increasingly common condition.
Not everyone has the time or inclination to make your own meals. Every morning I agonise over which thing to have... hmm toast? Porridge? Cereals? Nah.... well, go on then.... use meter... argh...! Berries and cream? Fine for DM maybe but all that fat?! Bah! Egg and bacon with mushrooms, onions peppers etc should be suitable... but what about the salt in the bacon, the cholesterol in the egg? More bah!
It's a compromise that is going to be personal.
The meter will be your biggest ally. The labels can help avoid the BP and fatty stuff.
But what about eating in restaurants? Let's open another can of worms. 8)