If you need a link in your SMS then you will need to format is as below:
If you include the http:// before the address and take out the www. then you should be all set. Please test first but that should get you sorted.
Thanks for your query, If you press the CTRL V function on your keyboard it will paste whatever you last copied into the template.
Also if you are on our later versions of R4+ (6.6.1 or above) you can go over 155 characters but it would charge as 2 texts
You could also use a service such as https://tinyurl.com/ where you can turn a long URL into a short one.
And you can paste into the SMS box, simply copy the text then use "ctrl+v" on your keyboard to paste.
Hope that helps.