When a Product Backlog item or an Increment is described as 'Done', everyone must understand what 'Done' means. Scrum Team members must have a shared understanding of what it means for work to be complete, to ensure transparency and is used to assess when work is complete on the product Increment. This Definition of Done provides the team guidance on what it takes to make the increment shippable.

Many people misinterpret the Scrum Guide as stating the Development Team size is limited to 3-9 members. In reality, it only states that there is inherent risk attached to having less than 3 members and more than 9 members. As the number of members increases, the lines of communication also increase. This can be calculated using the Group intercommunication formula: n(n − 1) / 2 where n is the number of members. Some teams are able to handle the risk and "synergize" whereas others might struggle. Saying that, the relationship between defining a Sprint Goal and Development Team size is unclear.
But the relationship between the ordering of the Product Backlog, the PO having clear objectives, and the Sprint Goal are direct. The Product Owner typically comes to the Sprint Planning with a business objective in mind and Product Backlog items related to the business objective. After deciding what can be done for the upcoming Sprint, the Scrum Team will craft a Sprint Goal that would be met through the implementation of the items. This is not dependent on the size of the team nor length of the Sprint.
Scrum is also a framework that's fit for purpose. Some projects/products are not fit for Scrum... or, better stated, Scrum is not suitable for all projects/products.

As the Scrum Master, your role is to serve the Scrum Team by helping them to work effectively and deliver value. You are not responsible for managing the work or assigning tasks to the Developers. You should respect the self-organization and autonomy of the Developers, and support them in finding their own solutions to the problem. You should also facilitate collaboration and communication among the Developers and with other stakeholders, such as Phil and the Product Owner.

Because the Daily Scrum is owned and managed by the Development Team, it is up to them to decide on the most effective place and time to hold the Daily Scrum.

Scrum is founded on empirical process control and asserts that knowledge comes from experience and making decisions based on what is known. Scrum employs an iterative, incremental approach to optimize predictability and control risk. At the end of every Sprint, an increment of `done' work must be available in order to inspect and adapt accordingly.