First 2 GB is plenty for what you will be doing.
If you would mention both the manufacturer and the model then we could come up with whether or not it is possible to add more ram.
As said though, 2 GB is enough and plenty. Remember that's the upper limit for many netbooks.
Second, nowadays, not getting a DVD with Windows on it is very common.
Use the laptops option to make a set of backup DVD's. This will allow you to put the laptop back to the original status in case of a disaster.
Third, make a System Repair Disc. You will need this to handle many emergency and problem situations.
Fourth, buy an external USB disk and perform a system image backup of your laptop. This will also allow you to restore your laptop to the original status (assuming you made a System Repair Disc).
CREATE A SYSTEM REPAIR DISC
| type System Repair
key | Create Disc
CREATE A SYSTEM IMAGE BACKUP ∑ START
CREATE AND RESTORE A SYSTEM IMAGE
| type Backup your computer
In left-hand pane, select Create a System Image ∑
select where you want to save the backup | Next ∑
Select the drives you want to backup | Next ∑ Start Backup
button ∑ Finish
button after completion RESTORE A SYSTEM IMAGE BACKUP ∑
Boot from the System Repair CD you created. ∑
Connect the external drive with the backup image ∑ NEXT
button (change language if desired) ∑ Restore your computer using a system image
that you created earlier radio button ∑ NEXT
button ∑ Use the latest available system image radio button ∑ NEXT
button ∑ Format and repartition discs checkbox ∑ NEXT
button ∑ FINISH
button ∑ YES