There's not a "management console" as you would traditionally see. You will have accounts for the Meraki dashboard that have access to the organization/network. You can set a password for the local status page, which gives you SOME access to the device config but it's minimal.
The Meraki dashboard is a website like any other. If you want to enforce TLS 1.2 or above, you'll need to set that on your computers that are accessing the dashboard.
Unfortunately, as I understand it, we can't run the local status page over https - it's http only. Rec is disable local status page if you don't need it, when that's a problem.
@henrya34 just to add to the answer from @Nash I wanted to call out that for the security of the Meraki Dashboard itself, remember to check out the Organization > Settings page, where you can enable things like 2 factor authentication, restrict login IP ranges, set password complexity requirements and account lockout mechanisms, etc.
Also note that you have complete RBAC control of all admins, and there are self-maintaining immutable spreadsheets in the Meraki Dashboard for every successful and/or failed login attempt, and a complete change log with every change made by every admin, what they changed, old/new values, and it is fully searchable, sortable, and exportable.