Jason, you can break the red sealing tab on the top of the transmission fill tube and dip the transmission oil level. A custom dip stick is available on Ebay for 5 to 10 GBP. Alternatively use a long (about 1 meter) stiff wire. Push the dip stick in untill the end hits the bottom of the sump (ie untill it cant go any further) There are two levels one for hot and one for cold, they will be marked on the custom dip stick. If you use the stif wire then google the measurements. Check the oil sample on the end of the dip stick. Wipe the stick on a clean white kitchen towel. It should be red in colour when new. If it is dark brown and smells burnt then it needs changing ASAP. Anything in between and its your call.
If you are checking the level make sure that the car is on level ground. Check UTube for how to change the oil and filter etc.