What is another word you can use at start of sentence instead i?

It depends on what you want to convey! "I" is a very personal pronoun, so the best substitute depends on the context and your intent. Here are some options, with examples:

To make the sentence less personal:

* We: "We can go to the park later."

* You: "You should try that new restaurant."

* One: "One could argue that this is a good idea."

* It: "It seems like a good day for a walk."

* There: "There are many ways to approach this problem."

To emphasize a specific person or group:

* She: "She is a talented artist."

* He: "He finished the project early."

* They: "They decided to take a vacation."

To create a more formal tone:

* This: "This is a complex issue."

* That: "That is a good point."

* Here: "Here are some suggestions."

To express an opinion:

* Personally: "Personally, I think this is a mistake."

* Frankly: "Frankly, I'm not interested."

* Honestly: "Honestly, I'm not sure what to do."

To introduce an example:

* For instance: "For instance, we could try this method."

* For example: "For example, the cat likes to play with yarn."

* Such as: "Such as the dog, many animals enjoy playing fetch."

To express a cause or effect:

* Therefore: "Therefore, we should take action."

* Consequently: "Consequently, they had to reschedule the meeting."

* As a result: "As a result, the project was delayed."

Remember to choose the word that best fits the tone and meaning of your sentence!