subdirectory & multisite configuration issue

I know this scenario will make you confused … but in shortly I can tell you I’m beginner and not coder but I can read codes .. and I have project need to finish .

my scenario is I have BitNami Multi-site on Ubuntu OS virtual machine, I use it to create and practice on WP, I learn many things in short time coz I faced too much troubleshooting specially the networking configuration and site mapping .. and now it’s working smoothly. But in localhost!

lets say my virtual machine has IP address : 10.0.0.1

I create 3 subdomain sites

http://site1.10.0.01/
http://site2.10.0.0.1/
http://site3.10.0.0.1/

all of them have separate theme with separate contents after site mapping configurations

I have public domain lets say it’s http://www.mywebsite.com
Linux OS
this root URL I install WP without any configuration just has page file “site under constructions”

this week I create sub-directory folder with name : MyProject under root directory mywebsite.com/MyProject

after uploading the all files into MyProject folder creating the separate database and import it from local to live server, then change options table
siteurl : http://mywebsite.com/MyProject
home : http://mywebsite.com/MyProject

edit wp-config.php (DB_NAME, DB_USER, DB_PASSWORD, DB_HOST) during this week I’m searching for step by step what’s the next after that.

I’m confusing with many tutorials advice to edit .htaccess & wp-config.php my site is working only from root folder “main WP” but I can’t open the wp-admin page from sub-directory
http://mywebsite.com/MyProject/wp-admin/
.. it’s redirecting me to the root wp-admin.

have suggestions ?