Best method to expand a website?

Thanks for reading

My business has outgrown the website with a broader range of products and services. Its current structure is as follow:

service 1: domain.com/
forum: domain.com/forum/

how would I structure the new website to add in service 2 and service 3?

Plan1:
service1: domain.com/service1/
service2: domain.com/service2/
service3: domain.com/service3/
forum: domain.com/forum/

redirection problem - How to improve the code below to redirect in .htaccess, so that it keeps the /forum/ intact?

Code:

Redirect 301 / /service1/

or, is there an better alternative structure?

Thank you very much and happy new year!!!

How about something like :

Code:

root /_
	|-   /forum/
	|
	|-   /services/
	|		|- /service1/
	|		|- /service2/
	|		|- /service3/
	|
	|-   /faq/

And a nice portal at root (domain.com/) showcasing the best of your products and services with a very brief description of each of them; as well as putting some quality content from the forums (snippets of handpicked threads and posts, not some automatic last-5-posts thing)

EDIT: A very happy new year to you too.

thank you. Do you have any suggestion on the redirect code?