Please help me with my German?

There are just word endings, I wouldn't worry too much about them. There are the equivalents of ''-ity, -ness, -ty'' in English and are basically used to transform verbs or adjectives into nouns.

regieren (to govern) = Regierung (government)

hoffen (to hope) = Hoffnung (hope)

Arbeitslos (jobless) = Arbeitslosigkeit (joblessness - unemployment)

Not really the answer, but a helpful tip, if the word has -keit or -ung on the end, it will always be 'die'

-keit turns an adjective into a noun.Example :

eitel - Eitelkeit; strebsam - Strebsamkeit;

This doesn't work for all or even most adjectives, sometimes -heit replaces it : schoen - Schoenheit

-ung turns a verb into a noun.Examples :

ordnen - Ordnung; reinigen - Reinigung.

Again, this doesn't work for all or even most verbs.

I think you can check it up at any institute of languages close to you. Or get a German Dictionary in a liabrary near you.

All the best

GoodendAG-GOODMORNING!!