Welcome to the Manjaro community @Linux_Noobr
Regarding your microphone issue, some detailed system information would be helpful. Please read through the following pre-prepared instructions:
As a new or infrequent forum user, you are encouraged to take some time to familiarise yourself with Forum requirements; in particular, the many ways to use the forum to your benefit:
The Update Announcements contain a Known Issues and Solutions section and should generally be checked before posting a request for support.
Output of the inxi command (with appropriate parameters, and formatted according to forum guidelines) will generate information useful for those wishing to help:
inxi --filter --verbosity=8
or the short form (preferred):
inxi -zv8
- inxi man pages (Arch Manual)
Running `inxi` in `chroot`
Providing `inxi` when you cannot access your desktop environment
Regards.
Note that any code or command output (such as inxi output) should be placed within a scrollable pre-formatted text enclosure according to forum guidelines.
See here for instructions: 
[MiniHowTo] Present code or command output
Note: Grave accent (or, backtick) characters are used. 
For inline code or to show a single command:
- for example, typing: `code here` will display the text as
code here.
For multi-line command output:
- place text beween two rows of three (```) backtick characters to form a scrollable text box, or …
- use the </> button in the Compose window to achieve the same result.
The empty row between these rows of backtick characters is where to paste any multi-line command output (such as inxi).
An example of a pre-formatted text enclosure:
What is a Quark?
A. In Physics, an elementary particle and fundamental constituent of matter.
B. A character from the Star Trek: "Deep Space Nine" television series.
C. A soft, creamy, usually unsalted cheese traditional to central Europe.
You should be fine as long as you follow instructions provided by the helpers here, and provide information such as command output or logs if requested. After all, we were all newbies once-upon-a-time.
Although the volunteers are always happy to help, it should also be noted that the Forum Rules - Manjaro specifically include the section Life is a Two-way Street, which includes the following sentences:
That means browsing the forum and using the search feature to see if an issue identical or similar to yours already has a solution. Also, the following 2 wikis are very useful:
Anyway, make sure you provide the inxi -zv8 output and hopefully one of the forum’s audio experts will be able to help you.