Theme development

Not sure the best place to post this question.

I have a group of fields that I need to have laid out in a specific format but all I can seem to get is all in a column or all split between columns.

I have a profile image that I need to place left and a group of fields (Alias Name, First Name, Last Name, Age ) that needs to be displayed in block format on the row as the image on the right. Then have the rest of the page info as normal under to form the main body of the content.

I am using the olivero theme. I want when the navigation bar switches to mobile mode, the main menu is unfolded by default, like in the screenshot.

How can I do this properly ?

https://ibb.co/jWSfHzH

I am a developer who is planning to migrate a project using Drupal v9 to Drupal v10. I have created my Drupal site but finding problems with creating custom themes even when building with the starterkit_theme in the folder structure: drupal -> core -> themes -> starterkit_theme that I then copied into: drupal -> themes as directed by the README.txt located in the themes folder. It will not populate the starterkit_theme as a usable theme.

Hello,

if I like some of the freely available Bootstrap 5 themes out there on the web and would like to use it on my D9 installation, how would I best go on to convert a HTML theme to a Drupal theme?

Thanks,
Transmitter

Hello! I'm totally fresh with drupal and I'm currently working on 9.1.5 with bootstrap3 theme that contains child subtheme. Our main site is full of custom blocks, modules, script injectors and etc. I'm planning to develop and release it on drupal 10.x.x, but I've no clue how to export all those settings and prepare for next major update. What should I first do?

I'm looking to change the colors of these boxes, and could use some help if anyone is willing. 

https://designsystem.digital.gov/components/accordion/

I'm not sure where to put stylings, and I'm struggling with the documentation.