Absolutely, I can give you a few tips for your travel to Kuala Lumpur, Ipoh, and Kota Kinabalu:

Best Time to Visit:
March to October is the dry season, making it a particularly good time to visit these cities to enjoy outdoor activities and city sights. However, keep in mind, Malaysia's temperature is pretty stable throughout the year and rainfall is the main variation in climate.

Route and Accessibility:
Kuala Lumpur is well connected by air, Ipoh can be reached by a 2.5 hours picturesque train ride north from Kuala Lumpur. From Ipoh, you can take a short flight or bus to Kota Kinabalu.

Altitude and Acclimatization:
These cities are located in the lowlands and do not require any special acclimatization. However, if you plan to hike Mount Kinabalu, it's recommended to spend a day or two at Kinabalu Park to acclimatize to the altitude.

Accommodation and Booking:
You can find a wide range of accommodations- from budget to luxury hotels in all three cities. It's advisable to book in advance during peak seasons and festivals.

Clothing and Essentials:
Casual and comfortable clothing would work in this tropical climate, but bring a light jacket if you plan to visit highland areas or air-conditioned places. Don't forget a good pair of walking shoes, sunscreen, a hat and your swimsuit.

Health and Safety:
Drink bottled water, eat at reputable food outlets, avoid mosquito bites and take precautions against heatstroke. Also, heed local advisories regarding the pandemic.

Local Etiquette and Respect:
Malaysia is a multicultural country with predominantly Muslim population. When visiting religious places, dress modestly and behave respectfully. Always ask for permission before taking photos of people or at religious sites.

Enjoy your trip to Malaysia! Don't miss the street food, especially in Ipoh, which is known as a foodie's paradise.