Im trying to set up this character fora game thats tonight so fast help is needed

when selecting a feat for variant human i can only choose grapple but i want a different one

Feats other than grappler are not part of the D&D 5th edition SRD and will need to be unlocked from the marketplace before you can use it on D&D Beyond.

D&D Beyond can be used for free and contains information from the following "free to use" sources published by Wizards of the Coast:  D&D 5th edition SRD, D&D 5th edition Basic Rules, and Elemental Evil Companion.

Content from other sources, such as the Player's Handbook, Dungeon Master's Guide, or Monster Manual, will need to be purchased from the Marketplace or accessed via another user sharing content with you via their Master Tier Subscription.

If you have any other questions on this, please take a look at the Pricing & Purchase FAQ.

-modified quote stolen from Stormknight

The Grappler feat is the only non-race specific feat available in the free materials.  (Only stuff in the Basic Rules, SRD, and EEPC, UA and Matt Mercer's Blood Hunter are free).  

You have several options:

-you can homebrew the feat you want if you have the book in print

-you can purchase just the feat you want

-you can purchase a feats bundle

-you can purchase the entire source (e.g. Player's Handbook) the feat can be found in.

To purchase individual feats or the bundle, find the relevant source in the marketplace and click on "View Purchase Options."   Note that anything you spend on individual items or bundles  decreases the purchase price of the full source (and bundle, if applicable) if you decide to buy it later.

thank you guys so much