Can you start with them or do you have to build up with daily lenses first?
Doesn't have to be dailies, continous wear ones are essentially monthlies, some people take them out every night, or every other night, once a week and clean then.
In general a good optician will monitor you pretty closely when new to contacts. They should be recommending, after you've got taking them out/putting them in, to wear for a few hours the first time, few more hours the next day, few more hours the next day and then probably wear them for 6-8 hours and come in the next day wearing them so they can see how your doing. Some peoples eyes just don't go with contacts.
The same will happen at a later date when it comes to continous wear, firstly they'll(probably) be a different material to your other dailies so they'll want to just make sure you don't react to them. But they'll have you wear them for a couple days, come in, check a week later, if all's good probably take them out, clean the, give your eyes a break and try a couple weeks, see how the eyes are at the end of a month if theres no problems before then.
Some people can only use "continous" ones for a week before their eyes need a break, some can go a month, the only continous ones around last time just didn't get on with my eyes at all, I have astigmatism which sucks as contact lenses for astigmatism generally cost a LOT more than normal distance ones

But also limited choices, I tried them and after 3-4 days my eyes got really irritated so I use dailies or glasses if I cba'd. Monthlies/weeklies are crazy cheaper than dailies, even more so for astigmatism dailies. Depends how much you want to spend long term and how often you'll use them tbh, if its a couple days a week, dailies are easier, if every single day, try continous, or monthlies, its a slight pain but will save a lot of cash.