Absolutely! Visiting Edinburgh, Windermere and Dublin is a wonderful idea and I am sure you will have a splendid time.
Here are some travel tips for your journey:

Best Time to Visit:
The best time to visit these places is between June to August in the summer months, when the weather is typically mild and there are numerous cultural festivals, including the famous Fringe Festival in Edinburgh.

Route and Accessibility:
Edinburgh and Dublin are well-connected to major global cities via international airports. Windermere can be reached easily from both these cities via trains or rented cars.

Altitude and Acclimatization:
These places are all at low altitudes, therefore no acclimatization is required.

Accommodation and Booking:
It is advisable to book accommodation in advance, particularly if you're visiting during peak tourist seasons. All these places have a good selection of hotels, hostels, guesthouses and self-catering accommodations.

Clothing and Essentials:
Pack clothing suitable for a mild climate, including rain gear as showers can occur quite unpredictably in these areas. Comfortable shoes for walking are a must as these cities are best explored on foot. If you're planning on exploring the great outdoors in Windermere, packing hiking boots is also advisable.

Health and Safety:
Healthcare in these cities is excellent. If you have a European Health Insurance Card, you are eligible for free healthcare in Dublin. For minor ailments, pharmacies can help. Always maintain personal safety protocols and awareness while in crowded tourist areas.

Local Etiquette and Respect:
People in these cities are generally friendly and welcoming. In Dublin, tipping at restaurants is common, typically around 10-15% of the bill.
While visiting religious sites, respectful behavior and proper dress codes should be followed. Especially in Edinburgh, the Scottish preserve many traditional customs and values. It's also important to note that the legal drinking age in all these cities is 18.

Enjoy your trip!