Problem in finding free assets for my first fps game

i just started to learn how to make an fps game but i find it hard to get assets for textures, plants and Character hand models. could anyone suggest me please

You really need to learn how to use search engines whether it is at the Asset Store or on Google.

Also, when asking for help you really need to be more specific.

The first thing you must realize , it is very, very unlikely that you will find exactly what you want (especially for free).

Given that you may be able to find something that will make do. Check out these links from your question

Asset Store - Free

  1. FPS
  2. Textures - You really need to be more explicit
  3. Plants

Asset Store - Sorted by Price (Low to High)

  1. FPS
  2. Textures - You really need to be more explicit
  3. Plants
  4. Hands

Google

  1. Free Textures - You really need to be more explicit
  2. Plant Images
  3. Free Plant Models
  4. free models of hands