1. I’m presently on a shared hosting, if I start out with it and upgrade to a dedicated server with the same hosting company, is it most likely I’ll have a lot of issues with my website when files are transfer and when the IP is changed? If yes, what issues are most likely to happen and how severe will it be, and how long will my website most likely be offline? I’m not a web developer and I’ll like to know if I’ll get lots of headache with the changes especially with the IP address. I’m asking so I can decide if I should upgrade first and start my live site on the dedicated server. Although I’m on a tight budget and would prefer to start with the shared hosting, use most of my funds for marketing purposes for now then gradually move up. But if I’ll get lots of headache that will require users I’ve invested a lot in to be discouraged that my website is offline or not functioning well, then I’ll rather start up with a dedicated server.

2. For the plugins and themes i purchased and I’ve tested on a sub domain test site, can I still use those licenses uninterrupted on the live site or if I have to start up with the dedicated server which will be a different IP address. I noticed my current IP address is presently logged in via my purchases. 

Thanks for keeping this forum useful especially for newbies like me.