would i be able to upgrade to a dvd install after a live intsall by downloading from web, insted from a dvd wich seems to be difficult fore me to make work ?
After you have installed from a LiveCD, you can add software from the online repos or, in addition, add the DVD as a local “repo” to save downloading stuff which is already on the DVD and hasn’t been updated. Either way, you have access to the full range of software in the repos.
PS: There’s is no such thing as a typical DVD install.They are the same packages whether they came from the CD, DVD or from an online repo. You don’t need to install the whole DVD, you only need to install as much software as you need.