I am completely new to gardening and need advice on how to handle large patches of weed in my lawn. I have noticed there are a couple of different kind of weed that is growing and slowly taking over the rest of the grass as well.

Attaching images of the closeup and the lawn:



Any help will be greatly appreciated.

Cannot see just what weeds you have but a general weed and feed often works to a degree.

I would use professional help for one year.
After that you will be able to maintain your lawn (I do!).

Sometimes it is best to start over from scratch. If you think you are at that point, you can do the following:

1. Kill everything with an all-vegetation herbicide
2. Wait a couple of weeks–read the label of the herbicide you used in step 1 to be sure of the time you need to wait–and then till the soil
3. Either lay sod or establish seed in the area you wish to repair

It's more of a nuclear option but it works.